1.You can turn on/ off the receiver with transmitter (remote control) from any place within a reliable distance 2.Reliable control: The receiver only works with the transmitter which use same code. One/several transmitters can control one/several receivers simultaneously. 3.Wireless RF signal can pass through walls, floors, doors or windows. You can use two or more units in the same place. 4.Wireless control, easy to install. 5.Application: It can be used in industry automation, agriculture automation and home automation, such as factory, house, farm, pasture, vehicle, ship, offshore operation, aerial vehicle, field call, etc. Colour:Beige Material:ABS Specification: 1-13 Add Chinese Characters to number Characters Package Contents: 1 x remote control (including 1 x 12V23A battery) 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.