Genuine American-made surface-mount ringer ("mechanical bell"). Sounds like a "classic" telephone -- not a chirp or a warble. Volume adjustment lever.
Install where you need ringing but not a phone, or to ring on line-two for a two line phone that has just one bell.
Easy-to-use screw terminals. Rugged metal chassis with plastic cover. Price includes shipping to any destination in the USA. One-year warranty. Limited stock -- don't wait if you need one. Made by ITT or Western Electric. Cover color may vary from photo.