Features: * Wireless door chime plugs directly into an electrical outlet * Eight sound options * 1-1/2 in. speaker with volume control * 32 selectable codes prevent interference * Measures 4-3/8 in. x 2-5/8 in. x 1-1/2 in. * Plug-in * White What"s In The Box: * Thomas & Betts/Carlon RC3733D Wireless Door Chime Receiver