1)AC 80V-260V, DC 12V simple installation 2)Touch sensor, safe use 3)LED backlight display 4)Sweet music doorbel 5)OEM made Doorbell display,touch door bell system,make up the room for hotel & entertainment venues 1, LED backlit touch-design LED backlit touch-key achieve switch control. The standard pattern, clear and readily understood, and the light can be directed so the guests could control ...