The Uni-Com Kinetic Door Chimeis our most environmentally friendly door chime to date, with a battery free bell push and made from 50% recycled plastic!The Chime unit simply plugs into any 13A socket around your home, and with very low standby power consumption, you will be using minimal power while never missing a visitor or delivery. The Door Chime also has a built-in night light which automatically switches on when it is dark and off when daylight returns. The night light can be switched off if not required.The door chime is wireless, so no wiring is required, and has an extensive operating range of up to 150m. With 30 different chime melodies to choose from, 90dB (A) sound output with volume control and a flashing chime alert, you will always know when somebody is at your door.It has 3 operating modes - chime sound only, LED alert light only and both together, you can set your Door Chime to operate exactly as you want it to.The kinetic bell push is self powered when the button is pressed, so no battery required.Water resistant (IP55 rated) .