Silvercrest Battery-Free Wireless Doorbell

A clever kinetic doorbell that requires no batteries for the push button. When the button is pressed, kinetic micro-energy is converted into an electrical signal to ring the bell. The receiver unit simply plugs into a standard wall socket. Features include a splashproof (IPX4) bell push, 16 selectable melodies, 4 volume settings, and an operating range of up to 100m in open spaces.