The ZWN-RSM2 Switch Module have two channels switch ,that is a component of lighting control system, it can not be used separately but should turn an existing switch into a Z-Wave switch. This ZWN-RSM2 module is a Z-Wave enabled device and is fully compatible with other Z-Wave certified device from other manufacturers. In a Z-Wave network, each device is designed to act as a wireless repeater. Once the ZWN-RSM2 module is installed and setup with in your wall, it will retransmit the RF signal from one device to another until the intended device to intended device is reached. This ensures that the signal is received by its intended destination