The Heath Zenith Wireless Plug-In Doorbell Kit. The chime features an 8-note Westminster melody or 2-note melody for the front entrance and a Ding for your back entrance. All Hampton Bay Wireless Push Buttons, Door Bells and Alerts are compatible, so customize your door bell system.
Chime plugs into any standard wall socket
ETL certified
3 selectable tunes
One wireless push button included (CR2032 battery included)
Maximum sound decibel 85
FCC and IC certified