Heath Zenith SL-7451-02 Wireless Doorbell Kit w/ 3-Sound Options, Satin NickelFeaturing 3 sounds westminster, ding dong and ding, this Wireless Doorbell Kit will keep you alerted when doors or windows are opened. Transmission range up to 150 ft. Push button with battery included. Chime requires 3 "C" batteries (not included). Satin Nickel finish cover Tone bar sound quality Chime requires 3 "C" batteries (not included) Transmission range up to 150 ft Dimensions: 3. 75" (W) x 2" (D) x 7" (H). Specifications Sounds: 3 Sound