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 . 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.