Our recommendations are made independently through research and testing. We may receive commissions from purchases made via our links. Learn more.

KOIOS 4-In-1 Immersion vs BELLA 10-Speed Side-by-Side Comparison

Tina Pham
Tina Pham
Reviewer
Nguyen Ntk
Nguyen Ntk
Visual Specialist
Reviewed
Tested Using Methodology v1.0
Updated Jan 18, 2023
Tested Using Methodology v1.0
Updated Jan 17, 2023
The koios 4 in 1 hand blender standing on the gray table with its accessories, including a user manual, plastic beaker, whisk attachment, food processor located above a paper carton box. The KOIOS 4-in-1 immersion blender standing on the gray table with its accessories, including a user manual, plastic beaker, whisk attachment, food processor located above a paper carton box.
The BELLA immersion blender standing on the gray table with its accessories, including a user manual, plastic beaker, whisk attachment, food processor located above a paper carton box.
Blenders type
immersion
immersion

Our Verdict

8.0
Overall Score
  • Performance (50%)
    7.9/10
  • Design (20%)
    7.6/10
  • Usability (30%)
    8.3/10
7.1
Overall Score
  • Performance (50%)
    7.4/10
  • Design (20%)
    7.5/10
  • Usability (30%)
    6.3/10

After a series of tests, we found that the KOIOS 4-in-1 offers a better way to make smoothies at home. It’s also a more suitable immersion blender for your puree soup, emulsified sauces, and meringue cookies. 

On paper, the BELLA claims to be an all-purpose device, and our real-world experiences have found this to be true. However, we still consider this blender to be a waste of money due to its poorly-built and frustrating usability. When working at the highest speed settings, its motor shook so much we felt our hands would fall off. At some certain points within the test, we couldn’t even fully control it.

And that’s why even when compared to the KOIOS 4-in-1 in terms of price and efficiency, we still prefer the KOIOS 4-in-1.

Good Enough

KOIOS 4-in-1 Hand Blender Performance

BELLA 10-Speed Hand Blender Performance: Competitive Overall Efficiency
7.9
Performance Scores
  • Hot Soup Purée (35%)7.5/10
  • Frozen Fruit Smoothie (30%)7.8/10
  • Mayonnaise (15%)9.8/10
  • Almond Milk (15%)7.5/10
  • Whipped Egg-Whites (5%)7.0/10
7.4
Performance Scores
  • Hot Soup Purée (35%)7.5/10
  • Frozen Fruit Smoothie (30%)9.3/10
  • Mayonnaise (15%)9.0/10
  • Almond Milk (5%)6.0/10
  • Whipped Egg-Whites (5%)6.0/10
7.5

Hot Soup Purée

7.5
Scooping a spoon of pureéd soup made by the KOIOS 800W immersion hand blender from a plastic beaker.
Scooping a spoon of pureéd soup made by the KOIOS 800W immersion hand blender from a plastic beaker.
KOIOS 4-In-1 Immersion Hot Soup
A batch of soup pureéd by the KOIOS 4-in-1 hand blender is checked for smoothness by being drained through a stainless steel mesh strainer.
  • Pureeing Time: 30 seconds
  • Result: Slightly Chunky
  • Suction: No

None of the low-range blenders we tested could yield the silkiest puree in 30 seconds, but we think the KOIOS’ results will still be acceptable to most home cooks.  In particular, the soup looked silky but when we ran it through a strainer, too many tiny bits were left behind. Nevertheless, we were still satisfied with this blender, given its consistency and smooth operation. Just in case you’re expecting for silky, restaurant-quality pureés, we recommend the Vitamix 5-speed.

Scooping a spoon of pureéd soup made by the BELLA hand blender from a plastic beaker standing next to a smartphone displaying the total pureéing time (33 seconds).
Scooping a spoon of pureéd soup made by the BELLA hand blender from a plastic beaker standing next to a smartphone displaying the total pureéing time (33 seconds).
BELLA 10-Speed Soup
A batch of soup pureéd by the BELLA immersion blender is checked for smoothness by being drained through a stainless steel mesh strainer.
  • Pureeing Time: 30 seconds
  • Result: Chunky
  • Suction: Tightly

The BELLA is moderately capable at pureeing soup. In our test, it took around 30 seconds to blend and combine all the ingredients. However, we still found lots of tiny chunks when we ran the soup through a strainer. On the whole, blending didn’t go smoothly since the blender itself created a bit too much suction. At the highest speed settings, it vacuumed itself solidly to the beaker’s bottom, making it very difficult for us to make any movements. For a better performer overall, we recommend the Vitamix 5-speed or the KitchenAid cordless hand blender.

7.8

Frozen Fruit Smoothie

9.3
A white bowl containing a batch of green smoothie whose parts are scooped with a stainless steel spoon is between the KOIOS’s motor body and a smartphone displaying the total blending time (1 minute and 19 seconds).
A white bowl containing a batch of green smoothie whose parts are scooped with a stainless steel spoon is between the KOIOS’s motor body and a smartphone displaying the total blending time (1 minute and 19 seconds).
KOIOS 4-In-1 Immersion Smoothie
After finishing blending, the green smoothie made by the KOIOS hand blender was spread evenly throughout a white paper to check for solid chunks.
  • Blending Time: 1 min 20 secs
  • Result: Slightly Coarse
  • Suction: No

The manufacturer recommends this blender not be used to process frozen fruits. That fact made us skeptical about its overall capability. After much deliberation, we decided to stick to the initial plan, putting it through our frozen smoothie test anyway. To our surprise, its result was nearly the same as that produced by the Vitamix 5-speed immersion blender

In less than a minute and a half, it churned out a frozen smoothie that was flavorful enough to entice our taste buds. The drink didn’t have a velvety smoothness; it was a bit grainy since the kale wasn’t entirely liquified. Despite that, it was still a sweet, creamy combination that we loved to sip on.

The BELLA 10-Speed Smoothie Testing, from left to right: the BELLA motor body, a batch of green smoothie in a white bowl with parts of it being scooped with a spoon, and a smartphone displaying the total blending time (58 seconds).
The BELLA 10-Speed Smoothie Testing, from left to right: the BELLA motor body, a batch of green smoothie in a white bowl with parts of it being scooped with a spoon, and a smartphone displaying the total blending time (58 seconds).
Bella 10 Speed Smoothe
After finishing blending, the green smoothie was spread evenly throughout a white paper to check for solid chunks.
  • Blending Time: 58 secs
  • Result: Slightly Coarse
  • Suction: Slightly

Our BELLA transformed all the ingredients into a drinkable texture in approximately one minute, from start to finish. It didn’t have too much difficulty powering through frozen fruit or kale. The resulting smoothie was acceptable with very few unprocessed chunks.

9.8

Mayonnaise

9.0
A little bit of mayonnaise sticking in the whisk attachment of the KOIOS 4-in-1 hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the motor body and a smartphone displaying the total emulsion time (1 minute and 10 seconds).
A little bit of mayonnaise sticking in the whisk attachment of the KOIOS 4-in-1 hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the motor body and a smartphone displaying the total emulsion time (1 minute and 10 seconds).
KOIOS 4-In-1 Immersion Mayonnaise
  • Emulsifying Time: 1 min 10 secs
  • Result: Velvety
  • Suction: No

The KOIOS made short work of incorporating egg yolks and canola oil, churning out a harmonious texture in just over one minute. Apart from being one of the fastest, it was also among the few blenders in our test that produced exceptionally smooth emulsification. Our mayonnaise came out thick, creamy, and spreadable. For such a low-priced hand blender, this performance could hardly have been better.

A little bit of mayonnaise sticking in the whisk attachment of the BELLA hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the BELLA motor body and a smartphone displaying the total emulsion time (1 minute and 24 seconds).
A little bit of mayonnaise sticking in the whisk attachment of the BELLA hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the BELLA motor body and a smartphone displaying the total emulsion time (1 minute and 24 seconds).
BELLA 10-Speed Mayonnaise
  • Emulsifying Time: 1 min 25 secs
  • Result: Smooth
  • Suction: Yes

Making mayonnaise was easy with this blender. Of all the blenders we tested, it was among the fastest, beating our favorite blender — the Braun MultiQuick-5 by up to 30 seconds. That said, its mayonnaise didn’t come out very smooth and creamy. Still, for such a low-priced hand blender, this result is worthy of praise.

7.5

Almond Milk

6.0
The KOIOS’s motor body, a plastic beaker containing almond milk, a white plate of almond pulp, and a small red note displaying the total grinding time (1 minute 30 seconds) being side by side.
The KOIOS’s motor body, a plastic beaker containing almond milk, a white plate of almond pulp, and a small red note displaying the total grinding time (1 minute 30 seconds) being side by side.
KOIOS 4-In-1 Immersion Almond Milk
  • Grinding Time: 1 min 10 secs
  • Result: Fine
  • Suction: No

It was simple and easy to put together all the ingredients for a preservative-free milk using the KOIOS. Since this blender ground the nuts pretty evenly, our drink came out silky and creamy. That said, blending didn’t run smoothly; the blending beaker was too small, causing the liquid to overflow every time we moved the blender around.

If you intend to buy the KOIOS for drink preparation, don’t use the beaker that is included in its set.

  • Grinding Time: 1 min 15 secs
  • Result: Coarse
  • Suction: Tightly

Our non-dairy milk required nearly a minute and a half of blending, but it still didn’t come out as smooth and creamy as it should. And not only couldn’t the machine blend uniformly, but it also created bad suction, causing a mess when we struggled to lift it upward.

7.0

Whipped Egg-Whites

6.0
The 24-oz plastic beaker containing testing beaten egg-white of the KOIOS 4-in-1 immersion blender is put upside down on the gray table with its motor body and a smartphone displaying the total whipping time (2 minutes and 41 seconds) by its sides.
The 24-oz plastic beaker containing testing beaten egg-white of the KOIOS 4-in-1 immersion blender is put upside down on the gray table with its motor body and a smartphone displaying the total whipping time (2 minutes and 41 seconds) by its sides.
KOIOS 4-In-1 Immersion Whipped Egg-Whites
  • Beating Time: 2 min 40 secs
  • Result: Stiff
  • Suction: No

The KOIOS’s whisk attachment worked well — we got the perfect meringue out of the egg whites we beat with the whisk attachment. Its metal wires are bouncy and agile, so they’re flexible enough for whipping and fluffing. However, we can’t say for sure whether those wires will hold up to thick batters for bread doughs or baked cakes. 

On a pragmatic note, the whole beating process lasted nearly 3 minutes, but it didn’t cause hand fatigue like some models, namely the Mueller Ultra-Stick or the BELLA 10-speed. We felt entirely comfortable in that prolonged operation, from start to finish. Indeed, using this blender for preparing airy, creamy desserts will help you stay creative without springing for an expensive specialty device.

The 24-oz plastic beaker containing testing beaten egg-white is put upside down on the gray table with a BELLA motor body and a smartphone displaying the total whipping time (3 minutes) by its sides.
The 24-oz plastic beaker containing testing beaten egg-white is put upside down on the gray table with a BELLA motor body and a smartphone displaying the total whipping time (3 minutes) by its sides.
BELLA 10-Speed Whipped Egg-Whites
  • Beating Time: 3 minutes
  • Result: Stiff
  • Suction: No

The BELLA’s whisk attachment drew enough air into the egg whites to create stiff peaks in our test, but its prolonged beating operation left us with exhausted hands and extreme discomfort. So, even though this add-on can do the trick, we don’t think it’s a good alternative to a hand mixer when it comes to preparing emulsified sauces or meringue. There are other immersion blenders that can ensure smoother operations, such as the KOIOS 4-in-1 and the Breville Control Grip.

Practical Simplicity

KOIOS Hand Blender Design

BELLA 10-Speed Immersion Blender Design: Not Really Stand-Out
7.6
design Scores
  • Blending Shaft (30%)7.0/10
  • Build Quality (60%)7.5/10
  • Power Cord (5%)10/10
  • Beaker (5%)10/10
7.5
design Scores
  • Blending Shaft (30%)7.5/10
  • Build Quality (60%)7.0/10
  • Power Cord (5%)10/10
  • Beaker (5%)10/10

In the Box of the KOIOS Immersion Blender

In the Box of the BELLA 10-Speed Hand Blender
The KOIOS 4-in-1 Stick Blender is shipped with a paper carton box, an immersion blending wand, a motor body, a plastic beaker, a whisk attachment, a food processor, and a user manual.
  • Motor body 
  • Blending shaft 
  • Whisk attachment
  • Food processor
  • Beaker   
  • User manual

In addition to a blending wand, this blender also comes with a beaker, a whisk attachment, and a food processor to enhance its versatility.

The BELLA Stick Blender is shipped with a paper carton box, an immersion blending wand, a motor body, a plastic beaker, a whisk attachment, a food processor, and a user manual.
  • Motor body 
  • Blending shaft 
  • Whisk attachment
  • Food processor
  • Beaker   
  • User manual

Our set includes six pieces which are all free of harmful chemicals. All parts except the motor section are top-rack dishwasher safe.

Dimensions

The KOIOS 4-in Immersion Blender stands on top of its blending shaft on a gray table, with the length of the blending shaft being noted to the side as 7.9 inches, and the total length of the unit as 15.3 inches.
  • Height:
    15.3" (38.9 cm)
  • Width:
    2.1" (5.3 cm)
  • Weight:
    3.4 oz (96 g)
  • Shaft Length:
    7.9" (20.1 cm)

Like all the light-duty immersion blenders we tested, the KOIOS 4-in-1 is well balanced. It is compact, portable, and has a long blending shaft that can be immersed in even a deep pot.

The BELLA Immersion Blender standing on top of its blending shaft on a gray table, with the length of the blending shaft being noted to the side as 8.3 inches, and the total length of the unit as 15.2 inches.
  • Height:
    15.2" (38.6 cm)
  • Width:
    2.3" (5.8 cm)
  • Weight:
    2.0 oz (57 g)
  • Shaft Length:
    8.3" (21.1 cm)

So far, we haven’t encountered any challenges caused by this blender’s size. The machine itself is compact enough to store in a drawer, and it isn’t overly heavy. Weight isn’t a hindrance to the machine’s usability.

7.5

Build Quality

7.0
The whisk attachment, motor body, and blending shaft of the KOIOS 4-in-1 hand-held blender lying flat on a gray table.

Made of medium-quality plastic reinforced with brushed stainless steel, the KOIOS’ body feels relatively solid (but it doesn’t look as sleek as the higher-priced models). Unlike the BELLA 10-speed, it showed no scratches after our course of testing. So far, we haven’t noticed any damage on the exterior; our blender still looks shiny and brand new.

There is a special inner rotary core fixed in the blending shaft that’s different from most immersion blenders in this price range. Thanks to this add-on, the tools are easy to attach to the motor body. Not only that, but they also latch securely in place, unlike the Muller Ultra-Stick that occasionally let go of its whisk.

The whisk attachment, motor body, and blending shaft of the BELLA stick blender lie flat on a gray table.

The BELLA can be purchased for less than $30, but that low price tag is a clue as to its quality. The machine itself feels relatively solid, but it doesn’t look as sleek as the mid-range ones. With the exception of the blending shaft, all the parts are made of medium-grade plastic which may deteriorate and collect scratches over the years. 

Not only that, but several Amazon users have complained about the inner components. Some claim that the plastic core that connects the blending wand to the main body somehow got shredded, rendering the blender useless. Others were frustrated when the tabs that connect to attachments broke. 

All things considered, we don’t think the BELLA is a reliable performer, even though it’s backed by an impressive warranty (two years).

10

Beaker

10
An included plastic beaker of the KOIOS 4-in-1 hand blender standing on a gray table.
  • Material:
    Plastic
  • Capacity:
    20 oz
  • Measurements:
    Yes
  • Weight:
    0.22 lb
  • Height:
    6.7" (17.0 cm)
  • Dishwasher Safe:
    Yes
  • Tamper Included:
    No

The KOIOS’ beaker has a small 20-oz capacity with measurements in both milliliters and fluid ounces. As a nice bonus, it sports a flared base to ensure stability.

A 30-oz plastic beaker of the BELLA Immersion Blending standing on a gray table.
  • Material:
    Plastic
  • Capacity:
    30 oz
  • Measurements:
    Yes
  • Weight:
    0.29 lb
  • Height:
    7.2" (18.3 cm)
  • Dishwasher Safe:
    Yes
  • Tamper Included:
    No

The BELLA blender comes with a large beaker that shows measurements in both milliliters and fluid ounces. It’s a simple affair with an easy-pour spout and a flared base for stability.

Speed and Controls of the KOIOS 800W Hand Blender

Speed and Controls of the BELLA 10-Speed Immersion Blender
A close-up of the Power button and the TURBO button of the KOIOS 4-in-1.
A close-up of the Power button and the TURBO button of the KOIOS 4-in-1.
A close-up of 12 speed settings on the top of the KOIOS’s motor body.
  • Control Type:
    Press-button & speed dial
  • Min Speed:
    11,500 RPM
  • Max Speed:
    14,480 RPM
  • Presets:
    No
  • Noise Level:
    90 dB
  • Digital Display:
    No
  • Pulse Mode:
    Yes

We often feel a bit awkward with blenders that control speed with top-mounted dials; it’s really challenging to move the blending wand, adjust its speed, and hold the beaker at the same time. With the KOIOS, however, that isn’t an issue.

Our 4-in-1 machine offers 12 speed options and a Turbo function. It’s all controlled using two buttons and a dial. While the front controls are extremely responsive, the dial lets us switch between various speed settings with ease and this is partly because the blender itself runs very smoothly.

In particular, throughout each of our tests, we noticed that its motor didn’t vibrate too violently. This helped reduce the overall impact on the beaker and kept it stable rather than constantly jumping around the countertop. In other words, we didn’t need to hold the beaker throughout the whole job, so it wasn’t a problem to dial in the speed with a spare hand.

However, if you find it hard to adjust the dial, you can always just hit the turbo mode. That sends the blender into its highest speed immediately.

A close-up of the two speed control buttons of the BELLA immersion blender.
  • Control Type:
    Press-button & speed dial
  • Min Speed:
    14,730 RPM
  • Max Speed:
    16000 RPM
  • Presets:
    No
  • Noise Level:
    84 dB
  • Digital Display:
    No
  • Pulse Mode:
    No

On paper, the BELLA allows the users to easily switch between 10 speed options using the two front buttons and a top dial. Our real-world experience, though, indicates that while they get the job done, it takes a lot of force to press the buttons.

Likewise, the speed dial isn’t really essential. It’s hard to use because both hands are engaged while blending — one hand to maneuver the blender and the other to keep the beaker from jumping around the countertop with the motor’s violent vibration.

7.0

Blending Shaft

7.5
The blending wand of the KOIOS 4-in-1 hand blender lying flat on a gray table.
  • Material:
    Stainless steel
  • Type:
    Sharp Blade
  • Guard Material:
    Stainless steel
  • Blade Count:
    2
  • Removable:
    Yes
  • Dishwasher Safe:
    Yes

Made of standard stainless steel plated with titanium, the blade has two prongs: one is sharp and the other is dull. Its relatively fragile construction means it isn’t intended for tough ingredients like ice cubes or coffee beans, but it’s still tough enough to handle whole-food combinations.

Unlike most other blenders with lobed or angular guards, this one’s blade guard is shaped like a parabolic arch. This special design allows us to easily reach the blade’s backside for cleaning. The vaulted slope also doesn’t trap food the way others do, so we never had to stop and dislodge debris with a spoon.

The blade guard is also designed to reduce splattering, and it’s really up to the job. However, due to its metal construction and sharp edges, it left marks on the beaker even when we blended very carefully.

A close-up of the BELLA’s blending wand with 4 sharp stainless steel prongs.
A close-up of the BELLA’s blending wand with 4 sharp stainless steel prongs.
A close-up of the BELLA’s blending wand with 4 sharp stainless steel prongs from the side-viewing angle.
  • Material:
    Stainless steel
  • Type:
    Sharp Blade
  • Guard Material:
    Stainless steel
  • Blade Count:
    4
  • Removable:
    Yes
  • Dishwasher Safe:
    Yes

The blade has 4 prongs made of medium-quality stainless steel. It comes relatively sharp, but looks a bit fragile. If you use this blender for grinding tough ingredients, the blade assembly may get damaged.    

We appreciate that the blade guard was designed to prevent splattering, but don't think that it works as intended. It creates a lot of suction at the bottom of our beaker. And since it’s made of metal with harsh edges, the blade guard can leave marks on your non-stick cookware unless you blend very carefully.

10

Power Cord

10
The KOIOS 4-in-1 Immersion Blender on a gray table with its power cord rolled up next to it.
  • Cord Length:
    5.6 ft (1.7 m)
  • Type:
    2-prong plug
  • Detachable:
    No

The power cord is long enough that you won’t feel constrained. It has a small loop that is meant to keep the blender organized.

The BELLA 10-Speed  Immersion Blender on a gray table with its power cord rolled up next to it.
  • Cord Length:
    5.1 ft (1.6 m)
  • Type:
    2-prong plug
  • Detachable:
    No

The power cord is long enough to reach your nearby outlets. As a nice bonus, it has a small loop that allows you to hang the whole blender on a hook for easy storage.

Whisk Attachment

Extra Accessories

BELLA Immersion Blender with a Whisk Attachment
The KOIOS 4-in-1 Immersion Blender Whisk Attachment lying flat on a gray table.
  • Material:
    Stainless steel
  • Dishwasher Safe:
    Yes
  • Removable:
    Yes

This whisk attachment is moderately good at certain tasks like beating egg whites, whipping cream, and making emulsified sauces. Compared with other low-priced hand blenders such as the BELLA 10-speed or the Hamilton, its polished stainless steel wires feel more sturdy and durable under consistent use.

A whisk attachment of the BELLA hand-held blender lying flat on a gray table.
  • Material:
    Stainless steel
  • Dishwasher Safe:
    Yes
  • Removable:
    Yes

With the whisk attachment, your blender can act as a hand mixer for certain tasks such as whipping cream, beating egg whites, and emulsifying sauces. That said, it’s rather poorly built, so it may not survive long.

Food Processor

Extra Accessories

Food Processor
The KOIOS 4-in-1 Immersion Blender Food Processor standing on a gray table.
  • Material:
    Plastic and Stainless steel
  • Dishwasher Safe:
    Yes
  • Removable:
    Yes

We haven’t conducted tests on this attachment, but the stainless steel S-blade’s construction looks capable of chopping various foods just like any other low-grade food processor.

A food processor attachment of the BELLA hand blender standing on a gray table.
  • Material:
    Plastic and Stainless steel
  • Dishwasher Safe:
    Yes
  • Removable:
    Yes

We haven’t tested this attachment, but the stainless steel S-blade can probably chop, mix, and shred certain foods just like any other low-grade food processor.

KOIOS Stainless Steel Hand Blender Usability Review

BELLA Hand Blender Usability Review: A little Bit Disappointing
8.3
usability Scores
  • Ease of Use (60%)8.3/10
  • Blade Assembly (10%)8.5/10
  • Handling (20%)8.0/10
  • Cleanability (10%)8.5/10
6.3
usability Scores
  • Ease of Use (60%)6.0/10
  • Blade Assembly (10%)7.5/10
  • Handling (20%)6.0/10
  • Cleanability (10%)7.5/10
8.3

Ease of Use

6.0

This KOIOS is easier to use than many other blenders not only because of its simple design but also because its buttons are very responsive. The motor’s minimal vibration contributes to the overall usability scores as well. Since the machine itself runs very smoothly, we can maneuver the blender in comfort. It was a pleasant departure after the excessive vibration of some other blenders.

During our testing, we also found that this blender didn’t create suction — a main cause of splattering when you lift it upward for an even blend. As such, we didn’t experience any trouble when speeding up or moving the blending wand, even at the highest speed setting.

The controls are easy to understand, but we never got comfortable actually operating it. While its interface is very intuitive with only two buttons and a speed selection dial, the motor’s vibration made our hands entirely numb. Moreover, the buttons are too stiff and unresponsive, so our fingers got tired in a hurry. In some cases our fingers slipped right off the trigger button, causing unplanned interruptions to our testing process. 

The low rating of this blender’s usability isn’t all due to its controls, though. Throughout most of the tests, the blending shaft stuck itself so tightly to the container’s bottom that we couldn’t lift it up unless we shut off the motor. That’s quite unacceptable, in our opinion.

8.5

Blade Assembly

7.5
The KOIOS Blade Assembly

This blender comes with accessory ejection buttons on the motor body — a handy add-on giving you more control over the blade detachment process. Just a quick press of these clicky buttons pushes the attachment off of the motor body.

Putting them back is easy as well. Simply align the shaft with the main housing and push until they click and lock into place. There is one thing we really like about this blender’s blade assembly, though: Unlike others, the KOIOS attachments do not need to be rotated to a specific alignment to lock into place.

To blend, attach the blending wand or any mixing accessories to the main body by turning it in a counter-clockwise direction until tightened.

8.0

Handling

6.0
Someone uses two hands to control the KOIOIS immersion blender: one for holding the handle and pressing the power button at the same time, the other for rotating the speed dial.

The handle was comfortable to grip in all of the tests. Together with the machine’s minimal weight, its ergonomic design helps stave off hand fatigue, even through long bouts of vigorous blending. It also helped us maintain a grip even when the surface was wet or covered in grease.

Someone uses two hands to control the BELLA immersion blender: one for holding the handle and pressing the power button at the same time, the other for rotating the speed dial.

Designed with an ergonomic handle, this blender is meant to be comfortable to grip, reducing hand and wrist pain. Due to its violent vibration and stiff buttons, however, our hands got tired anyway.

8.5

Cleanability

7.5

We found the easiest and most effective way to clean the blending wand or any blending attachment was by scrubbing it under running tap water. More often than not, food tailings could be quickly removed, even when they accumulated in the blade’s backsides.

All the included accessories are top-rack dishwasher-safe and easy to clean manually. The main difficulties are in a few hard-to-reach spots such as the backsides of the blades. We had to use a bit of elbow grease on the food tailings.