Relay board is one kind of very popular switch module. You can use it control any devices on or off. This is a DC 5V controlled 2 channels relay module. It can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM and so on. It's high level trigger.
- 2-Channel relay interface board, - Each one needs 15-20mA Driver Current - Equipped with high-current relay : DC30V 10A AC250V 10A - Standard interface that can be controlled directly by microcontroller