This product has two interfaces, a -speed unit can control the speed of two fans. Power consumption is less than 0.1W, generating no heat, and is a very stable product. It works for all Antminers with PWM 4-pin fans. Fully compatible with Bitmain Antminer T9 +, T9, S9, S9i, S9j, S9k, L3 ++, L3+, L3, D3, A3, Z9 Mini, Z9, S9, DR3 and WhatsMiner M1 (M3X) series. Automatic adjustment simulator speed, 1 dummy fan simulator with dual plugs. Perfectly solves the problem without plugging in. Dual (one plug each) artificially generates 2200~6500 Fan RPM signals back to the control board. It can work under 5~36V. It is recommended to unplug the front fan and remove it so that it does not block airflow into the . Connect the fan simulator to the front fan outlet. The screenshot is the real-world testing. Color: white Material: plastic + cable Package Contents: 1 * Fan Simulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.