Swann SWHOM-DC810B-GL Wireless Door Chime with Compact Back-Lit Design (White) A stylish door chime system that's completely wireless to suit any home decor Push the doorbell & hear a melodic door chime - with 16 chimes to choose from Easy wireless installation mounts to walls & runs from 3 x AAA* battery power with up to 150ft/50m range+