It is a simple cheap Relay driver module. It supports 2 output relays that can be used to control AC and DC electrical devices such as lamps, motors, locks, solenoids and controlled using RF Remote Control
- 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current.
- Product Name : RF Controller 4 channels with remote.
- Voltage : 2.7~5.5V.
- Frequency : 315MHz.