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YIJU SY-702 Review | 46 Data compared

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  • Avg. price in UK: ~£35
  • Avg. price in US: ~$30
  • Max. CADR: 150 m³/h
  • Maximum room area: 20 m²
  • Maximum noise level: 47 dB
  • HEPA filter: yes
  • Weight: 1.7 kg

YIJU SY-702 review. Compare 46 technical specifications and user reviews to see how this product ranks in the Air Purifiers category and whether it is worth buying.

5.7

Overall score

What it is: An overall evaluation of products in the Air Purifiers category, based on technical analysis and user reviews.

When it matters: When you need a quick reference for identifying the best products in the Air Purifiers category.

Score components:

80.0%

5.7

Technical Score

20.0%

?

User score

Good
5.7

Technical Score

What it is: An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.

When it matters: When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.

Score components:

50.0%

3.8

Performance

40.0%

7.6

Features

10.0%

8.1

Design

Good
?

User score

What it is: A rating that combines user reviews with the total review volume for products in the Air Purifiers category.

When it matters: When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

?

User reviews

30.0%

?

Popularity

  • 7.1
    Bedroom use

    Score components:

    35.0%

    6.5

    Maximum noise level

    30.0%

    10

    Night mode

    20.0%

    1.7

    Maximum room area

    15.0%

    10

    Weight

  • 6.7
    Allergy relief

    Score components:

    35.0%

    3.1

    Max. CADR

    30.0%

    10

    HEPA filter

    20.0%

    5.5

    Number of filtration stages

    15.0%

    10

    Washable prefilter

  • 6.1
    Smoke removal

    Score components:

    35.0%

    10

    Activated carbon filter

    30.0%

    3.1

    Max. CADR

    20.0%

    5.5

    Number of filtration stages

    15.0%

    4.0

    Air quality indicator

  • No image
No image

Best prices in UK

    N/A~ £35

Best rankings

?

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

Verdict

The YIJU SY-702 is a compact, portable air purifier featuring a 3-layer filtration system composed of a pre-filter, H13 grade True HEPA filter, and a high-efficiency activated carbon filter that captures 99.97% of PM2.5 particles, allergens, dust, smoke, and odours down to 0.1 microns. Operating at a rated power of 16W with a clean air delivery rate (CADR) of 150 m³/h, this 100% ozone-free unit includes dual functionality as an aromatherapy diffuser, an integrated 2,000-hour filter life timer, one-button touch control, and an 8-hour auto-shutoff sleep mode that drops noise levels down to 28–30 dB while dimming the blue LED ambient nightlight. Main pros include its highly efficient medical-grade filtration, exceptionally quiet night mode operation, versatile aromatherapy capability, and a travel-friendly, lightweight design powered via USB Type-C. However, main cons include a restricted effective coverage area limited to small rooms up to 15 square metres, and a high-maintenance filter life that requires replacement every 3 to 6 months depending on local air pollution levels.

Technical Specifications of air purifier YIJU SY-702

Technical Score

What it is: An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.

When it matters: When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.

Score components:

50.0%

?

Performance

40.0%

?

Features

10.0%

?

Design

5.7
YIJU SY-702 has a technical score of 5.72 points, which is lower than 73.8% of products in this category.
User score

What it is: A rating that combines user reviews with the total review volume for products in the Air Purifiers category.

When it matters: When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

0.0

User reviews

30.0%

1.0

Popularity

?
Popularity
What it is: An indicator based on the number of reviews received by products in the Air Purifiers category.
When it matters: When you prefer products in the Air Purifiers category that have been chosen and reviewed by many other buyers.
1.0
YIJU SY-702 has a popularity of 1 points, which is lower than 84.2% of products in this category.
Ratio quality/price

What it is: An indicator that combines the overall score of products in the Air Purifiers category with their prices.

When it matters: When you are comparing products in the Air Purifiers category and want a good balance between quality and price.

Score components:

60.0%

5.7

Overall score

40.0%

10

Price

7.0
YIJU SY-702 has a quality-to-price ratio of 7 points, which is lower than 74.9% of products in this category.
Power
What it is: The electrical power consumption of the air purifier during operation, measured in watts (W).
When it matters: Helpful for estimating long-term electricity costs, particularly when running the unit continuously day and night.

Importance: HIGH

16 W
YIJU SY-702 has a power output of 16 W, which is lower than that of 83.4% of air purifiers and the same as that of 1.1% of air purifiers.
Max. CADR
What it is: The Clean Air Delivery Rate (CADR), measuring the volume of purified air delivered per hour in cubic metres.
When it matters: Crucial for determining how rapidly the purifier circulates and cleans room air, especially for severe allergies or larger spaces.

Importance: HIGH

150 m³/h
YIJU SY-702 delivers a CADR of 150 m³/h, which is lower than that of 75.2% of air purifiers and the same as that of 3.1% of air purifiers.
Maximum room area
What it is: The maximum recommended floor area (in square metres) that the air purifier can effectively treat.
When it matters: Essential for matching the purifier's airflow capacity to your room size so all air is filtered thoroughly.

Importance: HIGH

20 m²
YIJU SY-702 covers up to 20 m², which is smaller than 86.2% of air purifiers and the same as 3.5% of air purifiers.
N. of speeds
What it is: The number of manual airflow speed levels available to choose on the air purifier.
When it matters: Provides flexible control between whisper-quiet low speeds for sleeping and powerful high speeds for fast room clearing.

Importance: MEDIUM

3
YIJU SY-702 offers 3 fan speeds, which is more than 6.7% of air purifiers and the same as 48.6% of air purifiers.
Maximum noise level
What it is: The sound level emitted by the air purifier when running at its highest fan speed, measured in decibels (dB).
When it matters: Important if you plan to use the purifier in bedrooms, nurseries, or home offices where loud fan noise causes disturbance.

Importance: HIGH

47 dB
YIJU SY-702 reaches 47 dB at maximum speed, which is quieter than 83.5% of air purifiers and the same as 1.2% of air purifiers.
Show more
Air quality indicator
What it is: An optical or laser sensor system displaying real-time indoor pollution levels via color rings or numerical values.
When it matters: Provides immediate visual feedback on air cleanliness and confirms that the purifier is working effectively.

Importance: MEDIUM

no
YIJU SY-702 does not have an air-quality indicator. This feature is present on 65.4% of air purifiers.
Continuous purification
What it is: Engineered motor and filter architecture designed for safe, uninterrupted 24/7 operation without thermal degradation.
When it matters: Essential for maintaining permanently low allergen and dust concentrations in polluted urban areas or high-pollen seasons.

Importance: LOW

yes
YIJU SY-702 supports continuous purification. This feature is present on 86.3% of air purifiers.
Auto mode
What it is: An intelligent operating mode that automatically increases or decreases fan speed based on live sensor pollution readings.
When it matters: Maximizes convenience and saves electricity by running quietly on low speed and ramping up only when pollution is detected.

Importance: MEDIUM

no
YIJU SY-702 does not have auto mode. This feature is present on 67% of air purifiers.
Timer
What it is: A programmable shut-off countdown timer that turns off the air purifier automatically after a set number of hours.
When it matters: Convenient for running the unit for a specific duration before leaving home or going to bed without wasting electricity.

Importance: LOW

yes
YIJU SY-702 has a timer. This feature is present on 75% of air purifiers.
Maximum timer
What it is: The longest selectable countdown duration available on the air purifier's timer, expressed in hours.
When it matters: Relevant if you prefer setting extended automated operating cycles, such as a full 8-hour workday or 12-hour overnight window.

Importance: LOW

8 hours
YIJU SY-702 features a maximum timer of 8 hours, which is longer than that of 5.5% of air purifiers and the same as that of 57.8% of air purifiers.
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Color
What it is: The primary exterior color and aesthetic finish of the air purifier housing.
When it matters: Important for ensuring the appliance blends harmoniously into your room decor and furniture style.

Importance: LOW

black
Material
What it is: The primary manufacturing material used for the outer casing, such as ABS plastic, polycarbonate, or aluminum.
When it matters: Influences structural rigidity, scratch resistance, premium appearance, and ease of wiping clean.

Importance: LOW

plastic
Display
What it is: An integrated digital screen showing active fan speed, particulate pollution numbers, filter health, and active timers.
When it matters: Enables quick visual checks of air metrics and purifier settings directly on the device without picking up your phone.

Importance: LOW

yes
YIJU SY-702 has a display. This feature is present on 51.1% of air purifiers.
Display position
What it is: The physical placement of the display screen on the body of the air purifier (e.g., top panel or front facade).
When it matters: Affects viewing convenience: top displays are easiest to read while standing, while front displays are visible from across the room.

Importance: LOW

front
Control type
What it is: The user interface mechanism for operating the device, such as capacitive touch keys, push buttons, or rotary dials.
When it matters: Determines tactile responsiveness, ease of operation in dark rooms, and durability over years of regular use.

Importance: LOW

touch
Show more

YIJU SY-702 vs the average air purifier

  • 6 dB lower maximum noise level
    YIJU SY-702 runs quieter at maximum speed than the average air purifier (47 dB vs 53 dB).
    What it is: The sound level emitted by the air purifier when running at its highest fan speed, measured in decibels (dB).
    When it matters: Important if you plan to use the purifier in bedrooms, nurseries, or home offices where loud fan noise causes disturbance.

    Importance: HIGH

    YIJU SY-702 runs quieter at maximum speed than the average air purifier (47 dB vs 53 dB).47 dB vs 53 dB
  • Has a child lock
    YIJU SY-702 has a child lock; the average air purifier does not.
    What it is: A safety lock feature that disables the on-device control panel buttons to prevent unintended changes.
    When it matters: Essential in households with curious toddlers or pets who might accidentally switch off the purifier or alter speed settings.

    Importance: MEDIUM

    YIJU SY-702 has a child lock; the average air purifier does not.
  • Supports 360° purification
    YIJU SY-702 supports 360° purification; the average air purifier does not.
    What it is: A cylindrical or multi-directional intake design that draws in polluted room air from all surrounding angles.
    When it matters: Improves airflow circulation and offers versatile room placement without needing to position the intake toward open space.

    Importance: MEDIUM

    YIJU SY-702 supports 360° purification; the average air purifier does not.
  • 62.8% lower weight
    YIJU SY-702 is lighter than the average air purifier (1.7 kg vs 4.57 kg).
    What it is: The total physical net weight of the air purifier without packaging, measured in kilograms (kg).
    When it matters: Important if you frequently carry the purifier between rooms, to different floors, or place it on furniture.

    Importance: MEDIUM

    YIJU SY-702 is lighter than the average air purifier (1.7 kg vs 4.57 kg).1.7 kg vs 4.57 kg
  • Has an ionizer
    YIJU SY-702 has an ionizer; the average air purifier does not.
    What it is: An auxiliary electronic feature releasing negative ions that attach to airborne particles, causing them to clump and settle faster.
    When it matters: Acts as a supplementary cleaning boost for fine dust, though buyers sensitive to ozone should ensure it can be toggled off.

    Importance: LOW

    YIJU SY-702 has an ionizer; the average air purifier does not.
  • 12.3 cm narrower width
    YIJU SY-702 is narrower than the average air purifier (15 cm vs 27.3 cm).
    What it is: The horizontal width across the front of the air purifier, measured in centimetres (cm).
    When it matters: Essential for confirming the unit fits neatly between furniture, in tight corners, or on compact bedside tables.

    Importance: LOW

    YIJU SY-702 is narrower than the average air purifier (15 cm vs 27.3 cm).15 cm vs 27.3 cm
  • 28 cm shorter height
    YIJU SY-702 has a lower height than the average air purifier (22 cm vs 50 cm).
    What it is: The vertical height of the air purifier unit, measured in centimetres (cm).
    When it matters: Important for ensuring the unit fits underneath tables, under low window sills, or onto designated shelves.

    Importance: LOW

    YIJU SY-702 has a lower height than the average air purifier (22 cm vs 50 cm).22 cm vs 50 cm
  • 7 cm shallower depth
    YIJU SY-702 is shallower than the average air purifier (15 cm vs 22 cm).
    What it is: The front-to-back depth measurement of the air purifier, in centimetres (cm).
    When it matters: Determines how far the purifier protrudes outward into walkways or away from walls.

    Importance: LOW

    YIJU SY-702 is shallower than the average air purifier (15 cm vs 22 cm).15 cm vs 22 cm
  • 6 dB lower maximum noise level
    YIJU SY-702 runs quieter at maximum speed than the average air purifier (47 dB vs 53 dB).
  • Supports 360° purification
    YIJU SY-702 supports 360° purification; the average air purifier does not.
  • Has a child lock
    YIJU SY-702 has a child lock; the average air purifier does not.
  • Has an ionizer
    YIJU SY-702 has an ionizer; the average air purifier does not.
  • 62.8% lower weight
    YIJU SY-702 is lighter than the average air purifier (1.7 kg vs 4.57 kg).
  • 12.3 cm narrower width
    YIJU SY-702 is narrower than the average air purifier (15 cm vs 27.3 cm).
  • 28 cm shorter height
    YIJU SY-702 has a lower height than the average air purifier (22 cm vs 50 cm).
  • 7 cm shallower depth
    YIJU SY-702 is shallower than the average air purifier (15 cm vs 22 cm).

Total
Overall
Performance
Features
Design
  • 37.5% lower CADR
    YIJU SY-702 provides a lower clean air delivery rate than the average air purifier (150 m³/h vs 240 m³/h).
  • 29 m² smaller room area
    YIJU SY-702 covers a smaller room area than the average air purifier (20 m² vs 49 m²).
  • 21.5 W lower power
    YIJU SY-702 has a lower power output than the average air purifier (16 W vs 37.5 W).
  • No air-quality indicator
    YIJU SY-702 does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    YIJU SY-702 does not have auto mode; the average air purifier does.
  • 0.6 m shorter power cord
    YIJU SY-702 features a shorter power cord than the average air purifier (1.2 m vs 1.8 m).
  • 26307.03 cm³ larger external volume
    YIJU SY-702 has a larger overall volume than the average air purifier (4950 cm³ vs 31257.025 cm³).
  • No air-quality indicator
    YIJU SY-702 does not have an air-quality indicator; the average air purifier does.
    What it is: An optical or laser sensor system displaying real-time indoor pollution levels via color rings or numerical values.
    When it matters: Provides immediate visual feedback on air cleanliness and confirms that the purifier is working effectively.

    Importance: MEDIUM

    YIJU SY-702 does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    YIJU SY-702 does not have auto mode; the average air purifier does.
    What it is: An intelligent operating mode that automatically increases or decreases fan speed based on live sensor pollution readings.
    When it matters: Maximizes convenience and saves electricity by running quietly on low speed and ramping up only when pollution is detected.

    Importance: MEDIUM

    YIJU SY-702 does not have auto mode; the average air purifier does.
  • 37.5% lower CADR
    YIJU SY-702 provides a lower clean air delivery rate than the average air purifier (150 m³/h vs 240 m³/h).
    What it is: The Clean Air Delivery Rate (CADR), measuring the volume of purified air delivered per hour in cubic metres.
    When it matters: Crucial for determining how rapidly the purifier circulates and cleans room air, especially for severe allergies or larger spaces.

    Importance: HIGH

    YIJU SY-702 provides a lower clean air delivery rate than the average air purifier (150 m³/h vs 240 m³/h).150 m³/h vs 240 m³/h
  • 29 m² smaller room area
    YIJU SY-702 covers a smaller room area than the average air purifier (20 m² vs 49 m²).
    What it is: The maximum recommended floor area (in square metres) that the air purifier can effectively treat.
    When it matters: Essential for matching the purifier's airflow capacity to your room size so all air is filtered thoroughly.

    Importance: HIGH

    YIJU SY-702 covers a smaller room area than the average air purifier (20 m² vs 49 m²).20 m² vs 49 m²
  • 21.5 W lower power
    YIJU SY-702 has a lower power output than the average air purifier (16 W vs 37.5 W).
    What it is: The electrical power consumption of the air purifier during operation, measured in watts (W).
    When it matters: Helpful for estimating long-term electricity costs, particularly when running the unit continuously day and night.

    Importance: HIGH

    YIJU SY-702 has a lower power output than the average air purifier (16 W vs 37.5 W).16 W vs 37.5 W
  • 0.6 m shorter power cord
    YIJU SY-702 features a shorter power cord than the average air purifier (1.2 m vs 1.8 m).
    What it is: The total physical reach of the supplied electrical power cord, measured in metres (m).
    When it matters: Determines optimal placement flexibility relative to wall power outlets without needing extension cables.

    Importance: LOW

    YIJU SY-702 features a shorter power cord than the average air purifier (1.2 m vs 1.8 m).1.2 m vs 1.8 m
  • 6.23x less popular
    YIJU SY-702 is less popular than the average air purifier (1 vs 6.23).
    What it is: An indicator based on the number of reviews received by products in the Air Purifiers category.
    When it matters: When you prefer products in the Air Purifiers category that have been chosen and reviewed by many other buyers.
    YIJU SY-702 is less popular than the average air purifier (1 vs 6.23).1 vs 6.23
  • 6.6% worse value for money
    YIJU SY-702 offers worse value for money than the average air purifier (7 vs 7.463).
    What it is: An indicator that combines the overall score of products in the Air Purifiers category with their prices.
    When it matters: When you are comparing products in the Air Purifiers category and want a good balance between quality and price.
    YIJU SY-702 offers worse value for money than the average air purifier (7 vs 7.463).7 vs 7.46
Total
Overall
Performance
Features
Design

Graphic comparison of YIJU SY-702 and other products in the Air Purifiers category

Attribute category
Attribute
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Third-party reviews

What customers like about YIJU SY-702?

  • Equipped with an efficient H13 medical-grade True HEPA filter that removes 99.97% of fine particles, dust, and pollen.
  • Features a dual-function design that supports aromatherapy with a dedicated essential oil tray.
  • Operates quietly, particularly in its low-noise sleep mode (around 20 decibels).
  • Comes with convenient settings, including multiple fan speeds, timer functions, and adjustable ambient lighting.
  • Powered via a portable and convenient USB Type-C connection.
  • Highly budget-friendly and simple to operate.

What customers dislike about YIJU SY-702?

  • The physical size can feel somewhat bulky or unnecessary if used strictly in small rooms.
  • Operating noise can become noticeably loud and potentially disruptive at the highest speed settings.
  • The filter lifespan is relatively short, requiring full replacement every 3 to 6 months depending on usage.
  • The price point and coverage scale may not appeal to buyers looking for a heavy-duty or industrial-grade option.

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