This specially made wireless door chime ST60 is white-colored. It transmits signals as far as 300 feet, the signals can pass through doors, walls and etc. The coded receiver has 16 selectable channels to avoid any possible interference from other sources. It has three different tones to select. The door chime (receiver) runs on 3 pieces of C-size batteries or an AC adaptor, neither is included. Push button (transmitter) runs on a 12v battery which is included and can last for as long as 1 year. Both the chime and push button are wall or door mountable with included kit.