High-quality ultra-small optocoupler is used, with strong anti-interference ability, stable performance, and complete isolation of input signal and output. Input signal: PWM signal between 3~20V Output capacity: DC 3.7V~27V, each current within 10A PWM frequency: 0~200Hz Indicator light: with input signal and output indicator Application description: The output terminal can control high-power equipment, motors, light bulbs, LED light strips, DC motors, Micro-water pumps, solenoid valves, etc., and can input PWM to control motor speed, lamp brightness, etc. Module interface description: DC+: The positive pole of the DC power supply of the device DC-: Negative pole of the DC power supply of the device PWM: Signal input terminal (connected to MCU IO port, PLC interface, DC power supply, etc.) GND: Signal negative terminal OUT+: positive output terminal (connected to the positive pole of the device) OUT-: Negative pole of output terminal (connected to the negative pole of the device) size: 5.5 x 5cm Material: plastic colour: green Package Contents: 3 x Module 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.