6 Channels RF Wireless Remote Control Relay Module --arduino compatible Wireless control, easy to install. You can turn on/off the receiver with transmitter (remote control) from any place within a reliable distance; the wireless RF signal can pass through walls, floors and doors. With characteristics of reverse power protection and over current protection. This switch can learn different coding remote controls(such as 2262,1527 ect.),and working with indicator. Reliable control: The transmitter (Encoding) and the receiver (Decoding) use an 8-bit code. One/several transmitters can control one/several receivers simultaneously. If you use two or more receivers in the same place, you can set them with different codes.