The full-speed simulator controls the PWM signal to adjust the fan speed according to the execution instruction sent by the CPU of the mining machine. General noise reduction equipment such as: the speed of the is fixed, and the temperature of the mining machine is high during the day and low at night. The CPU will continuously generate PWM signals. If a fixed-speed simulator is used, it can only a fixed speed. The signals fed back to the CPU will cause conflicts, which will affect the computing power of the machine. Condition: New Type: fan simulator Model 1: 4-pin interface Fan Simulator Model 2: for EBIT Miner E9PRO E10D E11 48V Colour:white + black Material:plastic + cable Package Contents: 1 x Fan Simulator Only the above package content, other products are not included. Note: Light 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.