Product description:
4pin ATX fan speed simulator
4P big square head fan speed simulator is suitable for Whatsminer M32/M32S/M21S/M30S/M31S or any other miners with pulse wave modulation (PWM) cooling fans. It is suitable for all miners with PWM 4-pin fan. Its chip artificially generates a 2200~6500 Fan RPM signal back to the miner's control board. It can work under 5~36V. Please explain the model of the miner to the salesperson before purchasing.