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. 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. If you use multi-button transmitter, you can control the controller with different buttons, it won't affect each other. The wireless receiving controller, with high confidentiality, stable performance, low power consumption characteristic, jump line or dial the code switch coding. Color: White Material: Plastic+PCB Package Contents: 1* Wireless Switch Receiver 1*Transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.