761-Wired-Wall-Mounted-Electronic-Doorbell-with-8-Melodies-Byron-761-p-The-Byron-761-Wired-Doorbell-Kit-contains-everything-you-need-to-replace-your-current-doorbell-The-kit-contains-a-bell-push-wired-doorbell-5m-of-cable-&-clips-to-fasten-the-cable-p-p-The-square-indoor-unit-needs-to-be-installed-with-a-wire-8-12V-&-can-be-mounted-on-the-wall-The-included-cable-&-clips-complete-the-kit-so-you-don-t-have-to-buy-any-additional-cables-The-bell-push-&-door-chime-are-both-w