The Antminer one for four fan simulator, a fan speed simulator, and imported gold-plated sockets. It uses the VCC8 single-chip microcomputer program PMW to precisely control the speed, which is more stable and durable than the previous generation 555 chip fixed-speed touch-change simulation. A perfect power supply voltage stabilization protection circuit, whether it is plugged in reversely, wrongly plugged in, or the voltage is disordered, will not burn the board. It can be used normally after re-plugging correctly. Wireless direct plug, plug and play, very convenient to use. Suitable for Antminer L7 / D7 / s17+ / t17e / t17+ / s17e / t19 / s19 / s19+ / z15 / s19pro / s19a / s19j / s19h and so on.