The Loudring Telephone Ringer is easy to install. Simply plug it into your phone jack then plug a phone into the ringer. That's all there is to ensure you won't miss that important call... even if your in another room or out in the yard. Ringer runs on the phone line's power so there are never any batteries that need replacing.
Weight: 5.3 ozs.
Size: 2.5" W x 3.25" H x 1.75" D.
