Light Switch is an intelligent device that can be remotely controlled through Z-Wave® network and radio waves. In the Z-Wave® network communications, light switch can be connected to any Z-Wave® gateway. When using radio waves, light switch can be used in conjunction with Z-Wave® gateway. The frequency of radio waves used by gateway and switch is like this: different countries or areas, the radio frequency is different. Each light switch has a unique ID code. When we add or remove the switch from the alarm host, just place light switch in the Z-Wave® network range of gateway. Then we can easily find the switch through the device ID code.