Size: 33.4 * 25.6MM. Voltage: 3.3V, 5V. Port: the digital quantity level. The output load voltage: 0 to 24V. The output load current: <5A (more than 1A need to add heat sink). Platform: the Arduino, MCU, ARM, raspberry pie. The product features: Using original IRF520 power MOS tube, can adjust PWM output. Can let the Arduino drive up to 24 v load, such as LED lights belt, dc motor, micro pump, solenoid valve. By PWM adjustable can realize stepless dimming LED, motor stepless speed regulation The product instructions: PWM signal for high level effectively. When the PWM for high level (3.3 V to 3.3 V): As the power supply voltage, between V + and V - working indicator, work load. When the PWM is low level (0 V to 0.5 V): V + and V - between 0, work lights out, don't work load Package included: 1 x IRF520 Module.