OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS

CLEANmaxx Akku-Zyklon-Staubsauger Review | 52 Data compared

Avg. price:~£60Suction power (AW):?Battery runtime:35 minutesCapacity:0.8 LWeight:1.8 kg

CLEANmaxx Akku-Zyklon-Staubsauger Review: Compare 52 technical specifications and user reviews to see how this product ranks in the Vacuum Cleaners category and whether it is worth buying.

7.0

Overall score

Score
7.0/ 10
✕
What it is
An overall evaluation of the vacuum cleaner's quality, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best vacuum cleaners on the market.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 62% of models
Score components

80%

6.9

Technical Score

20%

7.4

User score

â–²Better than 62% of vacuum-cleaners
6.9

Technical Score

Technical score
6.9/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 65% of models
Score components

28%

6.5

Performance

22%

6.3

Battery

18%

8.4

Filtration

14%

6.5

Attachments

10%

8.2

Design

8%

6.1

Smart features

â–²Better than 65% of vacuum-cleaners
7.4

User score

User score
7.4/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 89% of models
Score components

70%

8.1

User ratings

30%

5.7

Number of reviews

Based on 76 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–¼Worse than 89% of vacuum-cleaners
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
  • cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger
cleanmaxx-akku-zyklon-staubsauger

Best prices

*As an Amazon Associate, we earn from qualifying purchases.

Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
Loading category ranking...

Verdict

The CLEANmaxx Cordless Cyclone Vacuum Cleaner is a versatile 2-in-1 bagless device featuring a 120W to 150W motor powered by a removable 22.2V (2000mAh) lithium-ion battery that delivers up to 10 kPa of suction power across a 2-stage regulation system. Key technical highlights include a lightweight design weighing approximately 1.4 to 1.5 kg, a generous 800 ml dust container, an extendable 80 cm aluminum telescopic tube, and an EPA 11 filtration system accompanied by a stainless steel filter. The primary pros are its excellent portability, cable-free maneuverability, a space-saving wall-mounting station, and specialized attachments like the "Power Rotation" electric floor nozzle that effectively lifts pet hair and dirt from keyboards, furniture, and hard floors. However, main cons include a relatively short runtime of 30 to 35 minutes on standard mode (which significantly decreases on maximum suction) and a lengthy charging time of up to 5 hours, making it less ideal for continuous deep cleaning of large, fully carpeted households.

Technical Specifications of vacuum cleaner CLEANmaxx Akku-Zyklon-Staubsauger

Technical Score
Technical score
6.9/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 65% of models
Score components:

28%

6.5

Performance

22%

6.3

Battery

18%

8.4

Filtration

14%

6.5

Attachments

10%

8.2

Design

8%

6.1

Smart features

6.9
CLEANmaxx Akku-Zyklon-Staubsauger has a technical score of 6.9 points, which is higher than 65.5% of vacuum cleaners.
User score
User score
7.4/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 89% of models
Score components

70%

8.1

User ratings

30%

5.7

Number of reviews

Based on 76 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
7.4
CLEANmaxx Akku-Zyklon-Staubsauger has a user score of 7.38 points, which is lower than 89.5% of vacuum cleaners.
Popularity
Popularity
5.7/ 10
✕
What it is
An indicator based on the number of reviews received by the vacuum cleaner.
When it matters
When you prefer a vacuum cleaner that has been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 51% of models
Popularity:
CLEANmaxx Akku-Zyklon-Staubsauger has a popularity score of 5.7 points, which is higher than 49.5% of vacuum cleaners.
5.7
CLEANmaxx Akku-Zyklon-Staubsauger has a popularity score of 5.7 points, which is higher than 49.5% of vacuum cleaners.
Ratio quality/price
Value for money
7.9/ 10
✕
What it is
An indicator that combines the vacuum cleaner's overall score with its price.
When it matters
When you are looking for a vacuum cleaner with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 67% of models
Score components:

60%

7.0

Overall score

40%

10

Price

7.9
CLEANmaxx Akku-Zyklon-Staubsauger has a value-for-money score of 7.9 points, which is higher than 66.9% of vacuum cleaners.
Suction power (AW)
?
Suction power (kPa)
10 kPa
Suction power (kPa)
10 kPa
â–¼ Worse than 92% of models
Market range: <11 kPa – >30 kPa
This vacuum cleaner has a suction pressure of 10 kPa, which is lower than that of 92% of vacuum cleaners and equal to that of 1.6% of vacuum cleaners.
Airflow
?
Motor type
brushed
Power consumption
120 W
Power consumption
120 W
★ Better than 93% of models
Market range: <165 W – >899 W
This vacuum cleaner draws 120 W, which is lower than the power consumption of 93.5% of vacuum cleaners and equal to that of 1.5% of vacuum cleaners.
Show more
Cordless
yes
Cordless
yes
â–² Better than 51% of models
This vacuum cleaner works cordlessly. 49.5% of vacuum cleaners offer cordless operation.
Battery runtime
35 minutes
Battery runtime
35 minutes
â–¼ Worse than 83% of models
Market range: <30 minutes – >70 minutes
This vacuum cleaner offers a battery runtime of 35 minutes, which is shorter than that of 82.9% of vacuum cleaners and equal to that of 6% of vacuum cleaners.
Charging time
4.25 hours
Charging time
4.25 hours
â–¼ Worse than 58% of models
Market range: <3 hours – >5 hours
This vacuum cleaner charges in 4.25 hours, which is slower than 57.9% of vacuum cleaners and equal to 6.5% of vacuum cleaners.
Battery capacity
2,200 mAh
Battery capacity
2,200 mAh
â–¼ Worse than 58% of models
Market range: <2k mAh – >3.6k mAh
This vacuum cleaner has a battery capacity of 2,200 mAh, which is smaller than that of 57.5% of vacuum cleaners and equal to that of 19.3% of vacuum cleaners.
Battery voltage
22.2 V
Battery voltage
22.2 V
â–² Better than 45% of models
Market range: <18 V – >28.8 V
This vacuum cleaner uses a battery voltage of 22.2 V, which is higher than that of 45.1% of vacuum cleaners and equal to that of 11% of vacuum cleaners.
Show more
Filter class
hepa
Filter class
hepa
â–¼ Worse than 38% of models
This vacuum cleaner uses filter class hepa, which is more advanced than the class used by 16% of vacuum cleaners and the same as the class used by 46% of vacuum cleaners.
Minimum overall efficiency
99.95%
Minimum overall efficiency
99.95%
â–¼ Worse than 41% of models
Market range: <95 % – >99.99 %
This vacuum cleaner reaches 99.95% minimum overall efficiency, which is higher than that of 32% of vacuum cleaners and equal to that of 26.9% of vacuum cleaners.
Suitable for allergy sufferers
yes
Suitable for allergy sufferers
yes
â–² Better than 18% of models
This vacuum cleaner is suitable for allergy sufferers. 82.4% of vacuum cleaners are allergy-friendly.
Capacity
0.8 L
Capacity
0.8 L
â–¼ Worse than 54% of models
Market range: <0.44 L – >4 L
This vacuum cleaner has a dust capacity of 0.8 L, which is smaller than that of 54.2% of vacuum cleaners and equal to that of 7% of vacuum cleaners.
Bagless
yes
Bagless
yes
â–² Better than 21% of models
This vacuum cleaner uses a bagless design. 78.6% of vacuum cleaners use this setup.
Show more
Main brush type
roll brush
Roller type
bristled
Anti-tangle brush
no
Anti-tangle brush
no
â–¼ Worse than 26% of models
This vacuum cleaner does not include an anti-tangle brush. 25.7% of vacuum cleaners include this feature.
Mini motorized brush
no
Mini motorized brush
no
â–¼ Worse than 27% of models
This vacuum cleaner does not include a mini motorized brush. 26.9% of vacuum cleaners include this attachment.
Suitable for pet owners
yes
Suitable for pet owners
yes
â–² Better than 28% of models
This vacuum cleaner is suitable for pet owners. 72% of vacuum cleaners handle pet hair well.
Show more
Vacuum type
stick
Weight
1.8 kg
Weight
1.8 kg
★ Better than 94% of models
Market range: <2.15 kg – >7.1 kg
This vacuum cleaner weighs 1.8 kg, which is lower than the weight of 93.7% of vacuum cleaners and equal to that of 0.6% of vacuum cleaners.
2-in-1 design
yes
2-in-1 design
yes
â–² Better than 47% of models
This vacuum cleaner offers a 2-in-1 design. 53% of vacuum cleaners offer this flexible format.
Self-standing
no
Self-standing
no
â–¼ Worse than 19% of models
This vacuum cleaner does not stand on its own. 18.9% of vacuum cleaners offer this convenience.
Adjustable tube height
yes
Adjustable tube height
yes
â–² Better than 53% of models
This vacuum cleaner includes adjustable tube height. 47.4% of vacuum cleaners offer this ergonomic feature.
Show more
Auto suction adjustment
no
Auto suction adjustment
no
â–¼ Worse than 20% of models
This vacuum cleaner does not support automatic suction adjustment. 19.9% of vacuum cleaners support this feature.
Dust particle sensor
no
Dust particle sensor
no
â–¼ Worse than 8% of models
This vacuum cleaner does not include a dust particle sensor. 8% of vacuum cleaners include this feature.
LED display
yes
LED display
yes
â–² Better than 74% of models
This vacuum cleaner includes an LED display. 25.9% of vacuum cleaners include this interface feature.
Nozzle light
yes
Nozzle light
yes
â–² Better than 57% of models
This vacuum cleaner includes a nozzle light. 43.4% of vacuum cleaners include this visibility feature.
Mopping support
no
Mopping support
no
â–¼ Worse than 4% of models
This vacuum cleaner does not support mopping. 3.7% of vacuum cleaners support this multi-function feature.

CLEANmaxx Akku-Zyklon-Staubsauger vs the average vacuum cleaner

246810TotalPerformanceBatteryFiltrationAttachmentsDesignSmart features
  • Cordless operation
    Cordless
    yes
    â–² Better than 51% of models
    This vacuum cleaner works cordlessly, the average vacuum cleaner does not.
  • 50.3% lower weight
    Weight
    1.8 kg
    ★ Better than 94% of models
    Market range: <2.15 kg – >7.1 kg
    This vacuum cleaner is lighter than the average vacuum cleaner (1.8 kg vs 3.62 kg).
    1.8 kg vs 3.62 kg
  • Includes removable battery
    Removable battery
    yes
    â–² Better than 61% of models
    This vacuum cleaner includes a removable battery, the average vacuum cleaner does not.
  • 480 W lower power consumption
    Power consumption
    120 W
    ★ Better than 93% of models
    Market range: <165 W – >899 W
    This vacuum cleaner draws less power than the average vacuum cleaner (120 W vs 600 W).
    120 W vs 600 W
  • 8 minutes longer turbo runtime
    Turbo mode runtime
    20 minutes
    â–² Better than 85% of models
    Market range: <6 minutes – >20 minutes
    This vacuum cleaner offers longer turbo runtime than the average vacuum cleaner (20 minutes vs 12 minutes).
    20 minutes vs 12 minutes
  • Includes nozzle light
    Nozzle light
    yes
    â–² Better than 57% of models
    This vacuum cleaner includes a nozzle light, the average vacuum cleaner does not.
  • Includes LED display
    LED display
    yes
    â–² Better than 74% of models
    This vacuum cleaner includes an LED display, the average vacuum cleaner does not.
  • Includes battery indicator
    Battery level indicator
    yes
    â–² Better than 53% of models
    This vacuum cleaner includes a battery level indicator, the average vacuum cleaner does not.
  • 2.5x cheaper
    CLEANmaxx Akku-Zyklon-Staubsauger is cheaper than the average vacuum cleaner (£60 vs £150).
    £60 vs £150
  • 480 W lower power consumption
    Power consumption
    120 W
    ★ Better than 93% of models
    Market range: <165 W – >899 W
    This vacuum cleaner draws less power than the average vacuum cleaner (120 W vs 600 W).
    120 W vs 600 W
  • Less operating noise
    Noise level (Min-Max)
    70-75 dB
    â–² Better than 73% of models
    Market range: <65 dB – >83 dB
    This vacuum cleaner is quieter than the average vacuum cleaner (70-75 dB vs 77-77 dB).
    70-75 dB vs 77-77 dB
  • Cordless operation
    Cordless
    yes
    â–² Better than 51% of models
    This vacuum cleaner works cordlessly, the average vacuum cleaner does not.
  • Includes removable battery
    Removable battery
    yes
    â–² Better than 61% of models
    This vacuum cleaner includes a removable battery, the average vacuum cleaner does not.
  • 8 minutes longer turbo runtime
    Turbo mode runtime
    20 minutes
    â–² Better than 85% of models
    Market range: <6 minutes – >20 minutes
    This vacuum cleaner offers longer turbo runtime than the average vacuum cleaner (20 minutes vs 12 minutes).
    20 minutes vs 12 minutes
  • Includes battery indicator
    Battery level indicator
    yes
    â–² Better than 53% of models
    This vacuum cleaner includes a battery level indicator, the average vacuum cleaner does not.
  • 50.3% lower weight
    Weight
    1.8 kg
    ★ Better than 94% of models
    Market range: <2.15 kg – >7.1 kg
    This vacuum cleaner is lighter than the average vacuum cleaner (1.8 kg vs 3.62 kg).
    1.8 kg vs 3.62 kg
  • Includes wall bracket
    Wall-mounted bracket
    yes
    â–² Better than 64% of models
    This vacuum cleaner includes a wall-mounted bracket, the average vacuum cleaner does not.
  • Adjustable tube height
    Adjustable tube height
    yes
    â–² Better than 53% of models
    This vacuum cleaner has adjustable tube height, the average vacuum cleaner does not.
  • 140 mm narrower body
    Width
    125 mm
    ★ Better than 99% of models
    Market range: <229 mm – >350 mm
    This vacuum cleaner is narrower than the average vacuum cleaner (125 mm vs 265 mm).
    125 mm vs 265 mm
  • Newer release date
    Release date
    2023
    â–² Better than 72% of models
    Market range: <2k – >2k
    This vacuum cleaner has a newer release date than the average vacuum cleaner (2023 vs 2021).
    Released in November 2023.
    2023 vs 2021
  • Includes nozzle light
    Nozzle light
    yes
    â–² Better than 57% of models
    This vacuum cleaner includes a nozzle light, the average vacuum cleaner does not.
  • Includes LED display
    LED display
    yes
    â–² Better than 74% of models
    This vacuum cleaner includes an LED display, the average vacuum cleaner does not.
  • 10 kPa lower suction pressure
    Suction power (kPa)
    10 kPa
    â–¼ Worse than 92% of models
    Market range: <11 kPa – >30 kPa
    This vacuum cleaner has lower suction pressure than the average vacuum cleaner (10 kPa vs 20 kPa).
    10 kPa vs 20 kPa
  • 15 minutes shorter runtime
    Battery runtime
    35 minutes
    â–¼ Worse than 83% of models
    Market range: <30 minutes – >70 minutes
    This vacuum cleaner offers shorter battery runtime than the average vacuum cleaner (35 minutes vs 50 minutes).
    35 minutes vs 50 minutes
  • No upholstery nozzle
    Upholstery nozzle
    no
    â–¼ Worse than 68% of models
    This vacuum cleaner does not include an upholstery nozzle, the average vacuum cleaner does.
  • 300 mAh smaller battery capacity
    Battery capacity
    2,200 mAh
    â–¼ Worse than 58% of models
    Market range: <2k mAh – >3.6k mAh
    This vacuum cleaner has a smaller battery capacity than the average vacuum cleaner (2200 mAh vs 2500 mAh).
    2,200 mAh vs 2,500 mAh
  • 75 mm narrower cleaning path
    Cleaning path width
    185 mm
    â–¼ Worse than 99% of models
    Market range: <230 mm – >309 mm
    This vacuum cleaner has a narrower cleaning path than the average vacuum cleaner (185 mm vs 260 mm).
    185 mm vs 260 mm
  • 0.25 hours slower charging
    Charging time
    4.25 hours
    â–¼ Worse than 58% of models
    Market range: <3 hours – >5 hours
    This vacuum cleaner charges slower than the average vacuum cleaner (4.3 hours vs 4 hours).
    4.25 hours vs 4 hours
  • 0.2 L smaller dust container
    Capacity
    0.8 L
    â–¼ Worse than 54% of models
    Market range: <0.44 L – >4 L
    This vacuum cleaner has a smaller dust capacity than the average vacuum cleaner (0.8 L vs 1 L).
    0.8 L vs 1 L
  • 100 mm taller body
    Height
    1,200 mm
    â–¼ Worse than 85% of models
    Market range: <290 mm – >1.2k mm
    This vacuum cleaner is taller than the average vacuum cleaner (1200 mm vs 1100 mm).
    1,200 mm vs 1,100 mm
  • 8.4% lower user score
    User score
    7.4/ 10
    ✕
    What it is
    A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
    When it matters
    When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
    Score distribution
    ▼▼
    <55-66-77-88-99-10
    CLEANmaxx Akku-Zyklon-Staubsauger
    the average vacuum cleaner
    â–² Better than 72% of models
    CLEANmaxx Akku-Zyklon-Staubsauger has a lower user score than the average vacuum cleaner (7.38 vs 8.000).
    7.38 vs 8
  • 10 kPa lower suction pressure
    Suction power (kPa)
    10 kPa
    â–¼ Worse than 92% of models
    Market range: <11 kPa – >30 kPa
    This vacuum cleaner has lower suction pressure than the average vacuum cleaner (10 kPa vs 20 kPa).
    10 kPa vs 20 kPa
  • 75 mm narrower cleaning path
    Cleaning path width
    185 mm
    â–¼ Worse than 99% of models
    Market range: <230 mm – >309 mm
    This vacuum cleaner has a narrower cleaning path than the average vacuum cleaner (185 mm vs 260 mm).
    185 mm vs 260 mm
  • 15 minutes shorter runtime
    Battery runtime
    35 minutes
    â–¼ Worse than 83% of models
    Market range: <30 minutes – >70 minutes
    This vacuum cleaner offers shorter battery runtime than the average vacuum cleaner (35 minutes vs 50 minutes).
    35 minutes vs 50 minutes
  • 300 mAh smaller battery capacity
    Battery capacity
    2,200 mAh
    â–¼ Worse than 58% of models
    Market range: <2k mAh – >3.6k mAh
    This vacuum cleaner has a smaller battery capacity than the average vacuum cleaner (2200 mAh vs 2500 mAh).
    2,200 mAh vs 2,500 mAh
  • 0.25 hours slower charging
    Charging time
    4.25 hours
    â–¼ Worse than 58% of models
    Market range: <3 hours – >5 hours
    This vacuum cleaner charges slower than the average vacuum cleaner (4.3 hours vs 4 hours).
    4.25 hours vs 4 hours
  • 0.2 L smaller dust container
    Capacity
    0.8 L
    â–¼ Worse than 54% of models
    Market range: <0.44 L – >4 L
    This vacuum cleaner has a smaller dust capacity than the average vacuum cleaner (0.8 L vs 1 L).
    0.8 L vs 1 L
  • No upholstery nozzle
    Upholstery nozzle
    no
    â–¼ Worse than 68% of models
    This vacuum cleaner does not include an upholstery nozzle, the average vacuum cleaner does.
  • 100 mm taller body
    Height
    1,200 mm
    â–¼ Worse than 85% of models
    Market range: <290 mm – >1.2k mm
    This vacuum cleaner is taller than the average vacuum cleaner (1200 mm vs 1100 mm).
    1,200 mm vs 1,100 mm
  • 35 mm deeper body
    Depth
    300 mm
    â–¼ Worse than 61% of models
    Market range: <170 mm – >440 mm
    This vacuum cleaner is deeper than the average vacuum cleaner (300 mm vs 265 mm).
    300 mm vs 265 mm

Graphic comparison of CLEANmaxx Akku-Zyklon-Staubsauger and other vacuum cleaners

No results found

Third-party reviews

Based on 76 buyer reviews from online shops.
Reviews last updated: July 2026 · How we calculate this
Read buyer reviews on Amazon →

What customers like about CLEANmaxx Akku-Zyklon-Staubsauger?

  • Affordable purchase price and great value for money
  • Lightweight and highly manoeuvrable, making it easy to carry around and use on stairs
  • Compact, space-saving design that can be disassembled easily for storage in small flats
  • Versatile 2-in-1 functionality that quickly converts from a stick vacuum to a handheld unit
  • Bagless operation with an easily detachable and rinseable dust container that eliminates recurring bag costs
  • Comes with a useful variety of accessories including crevice, floor, and brush nozzles

What customers dislike about CLEANmaxx Akku-Zyklon-Staubsauger?

  • Suction power is mediocre and frequently requires running on turbo mode to pick up crumbs and heavier dirt
  • Suction performance tends to degrade noticeably after a few months of regular use
  • Fragile plastic components and clips that are prone to cracking or breaking easily
  • Short battery runtime, particularly when utilizing the high-power turbo mode
  • Long battery recharging times compared to the amount of operational usage provided
  • High noise output during operation, with some users describing it as excessively loud

Expert reviews

In-depth analysis and verdict from leading tech publications

L
luigimartano.it
25/07/2026
Summary of the review
CLEANmaxx 22.2 V Review: The Cyclone Vacuum Cleaner That Won't Let You Down
(Translated)Show original

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Compare CLEANmaxx Akku-Zyklon-Staubsauger with other vacuum cleaners

1Product to compare no. 1
VS
2Product to compare no. 2
VS
3Product to compare no. 3 (optional)