The module is designed to switch heavy DC loads from a single digital pin of your microcontroller. Its main purpose is to provide a low cost way to drive a DC motor for robotics applications, but the module can be used to control most high current DC loads. Screw terminals are provided to interface to your load and external power source. An LED indicator provides a visual indication of when your load is being switched.  Specification  Weight: 10g  Size: 33.5 x 25.5mm  Max load (drain) current: <5A  Output load voltage :0-24V  Input Voltage: 3.3V, 5V  Package Included: 10x IRF520 MOSFET Driver Module