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Black 240mm dual-fan unit with infinity mirror lighting on front and sides

JONSBO

JONSBO ZB-240B 240mm 28mm 2x120mm ARGB case fan

SKU CH-9M8P-0E3PM MPN ZB-240B

A 240 mm dual-fan unit with 28 mm thickness, 700-2400 RPM, 20.95-65.26 CFM airflow, 0.45-3.20 mmH₂O pressure, 20.3-36.6 dB(A) noise, and 4-sided infinity-mirror ARGB lighting

  • Fan size240 mm
  • Number of fans2 Fans
  • Fan depth28 mm
  • Rotational speed700-2,400 rpm(±10%)
  • Airflow rate20.95-65.26 CFM
  • Air pressure rating0.45-3.2 mmH2O

Model ZB-240B

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  • Four-sided infinity mirror creates depth illusion
  • Single frame unifies two 120 mm fans for tidy build
  • PWM range 700–2400 rpm balances airflow and noise
  • 5 V ARGB header with pass-through simplifies lighting sync
  • 28 mm thick radiator-optimised profile fits standard mounts

Dual-fan ARGB unit

The JONSBO ZB-240B integrates two 120mm ARGB fans into a single 240mm by 28mm frame that mounts in standard case locations. It targets builders who want co-ordinated lighting and airflow without managing separate fan headers or cables.

PWM and 5V ARGB limits

Speed is regulated by a 4-pin PWM signal across a 700-2400rpm range, delivering 20.95-65.26 CFM at 0.45-3.20 mmH2O with noise between 20.3-36.6 dB(A). The 5V ARGB interface requires a compatible motherboard header or controller that can address 52 circumference LEDs plus 18 axis LEDs per unit.

Unified frame and daisy-chain wiring

A one-piece frame removes the gap between fans and uses a joint structure for straightforward screw mounting. One combined cable carries both PWM and ARGB signals to the motherboard, while male and female 5V ARGB connectors allow daisy-chaining to other lighting devices.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $23.99
Pricier than about 60% of the 8,339 comparable items (median $19.99).
Fan size 240 mm
Higher than about 94% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameJONSBO
Product lineZB SERIES
Model nameZB-240B
Product typeCase Fan
Product colorBlack
Performance
Rotational speed700-2,400 rpm(±10%)
Airflow rate20.95-65.26 CFM
Air pressure rating0.45-3.2 mmH2O
Size & build
Fan size240 mm
Number of fans2 Fans
Fan depth28 mm
Product dimensions242 mm（L）*123 mm（W）*28 mm（H）
Compatibility
Compatible withCase
Environment & compliance
Operating noise20.3-36.6 dB(A)
More details
LED lightingARGB

Other versions of this model

5 more in the same range

Questions about this item

Should I pick the 240 mm 28 mm version or a thinner 120 mm fan for my case?

The ZB-240B is a single 242 mm long frame holding two 120 mm fans at 28 mm thickness, so it fits 240 mm radiator mounts and delivers 20.95-65.26 CFM without needing separate fan headers.

What does the 2400 RPM top speed actually give me inside a build?

At 2400 RPM the pair pushes up to 65.26 CFM and 3.20 mmH2O static pressure while staying at 36.6 dB(A), making it strong enough for radiator or high-restriction mesh panels.

How does the 4-pin PWM and 3-pin 5V ARGB connector limit what I can control?

The 4-pin PWM header lets the motherboard regulate 700-2400 RPM speed automatically, while the 3-pin 5V ARGB link (with male and female ends) chains lighting to other 5V ARGB devices for unified effects.

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