The AT&T 210 Trimline telephone with memory dialing and other features such as Mute, allows you to hear the caller, but prevents the caller from hearing you.
Features Include:
Trusty Trimline - the most popular phone ever made!
Unique dial-in-handset design
Line-powered lighted keypad
3-position receiver volume control
Ringer off-lo-hi control
Flash and Redial keys
Mute Key
9-number speed-dial
3- Pre-labeled speed-dials for police, fire, medical
12-Number Memory
Great for tight wall-mount spots - only 3" wide, 9" high