Module features: 1. Equipped with optocoupler isolation, the control signal is isolated from the power supply of the controlled equipment, greatly improving the level of interference. 2. Compatible with microcontroller and Arduino light control board, 3V or 5V signal 3. High level start, low level stop, PWM speed regulation 4. Widely used for controlling motor start stop, solenoid valves and other tributary equipment 5. There are various specifications of MOS transistors available for selection, for example FR120N : 100V 9.4A LR7843 : 30V 161A AOD4184: 40V 50A 6. The signal input side can solder its own wiring terminals or pins, compatible with breadboards 7. Output can be soldered to terminals or directly soldered to wires 8. Module size 23mm X 16mm with 2 2mm diameter screw holes spaced 8mm apart