Heath Zenith SL-2796-02 Basic Series Wired Door Chime, White -- Heath Zenith's 96/M-B door chime is intended for hardwired installation, and may be used with one or two doors. It features two distinctive chimes, one for the back door and one for the front, so you'll know which door to head to. Powered by 16-volt AC transformer, sold separately (see Heath Zenith accessory #121AC-A).--Josh DettweilerWhat's in the BoxChime, hardware kit Product Description Heath Zenith SL-2796-02 Basic Series Wired Door Chime, White From the Manufacturer Wired Door Chime - White Molded Cover With Fine Flowing Lines Features White Cover Horizontal Accent Lines 2 Sounds- Ding Dong and Ding 90 Decibel Max Hardwired door chime (powered by 16-volt/10-watt or 16-volt/15-watt transformer) For use with hardwired doorbell systems Distinctive 2- and 1-note chime melodies distinguish front and back doors White molded cover with unique flowing-line design 7.25 by 2 by 4 inches Hardwired door chime (powered by 16-volt/10-watt or 16-volt/15-watt transformer) For use with hardwired doorbell systems Distinctive 2- and 1-note chime melodies distinguish front and back doors White molded cover with unique flowing-line design 7.25 by 2 by 4 inches USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.