? night indicator light with a mini light led indicator light up on each switch button is convenient for you to know the switch working stage and makes it easy to find the switch position in dark situation. ? set schedules to automatically power on and off as needed. ? easy to use remote on/off control using your smartphone. ? compatibility works with any standard zigbee hub. ? traditional mechanical button design the wall smart switch features in its mechanical button design, which can bring you comfortable using experience with click sound. each button control one channel light. operating frequency: 2.4 ghz range outdoor/indoor: 100m/30m internal pcb antenna power input: 100~240vac 50/60 hz working environment: temperature: -20?c~+55?c humidity: up to 90% non-condensing max load current: 220vac 4amps power input: 220vac 50/60hz dimensions: 86x86x47mm