Each switch has two parts
1. Touch screen.
2. Control Module.
Touch Screen communicates with the control module and take action accordingly for switching ON/OFF and dimming of electrical load. Every module has capability to be connected  in two- wire network. Upon receiving command for ON/OFF/dimming by any module, it sends communication to other control modules connected in the same network so that those modules get themselves  updated also. This configuration facilitates switch ON/OFF of electrical load from any Module connected in the same network.