This is the enhanced-clarity phone that combines amplified, high-quality audio with the convenience of multiple rechargeable handsets for easily-heard conversations throughout your home. Call volume can be increased up to 50dB using a distortion-free amplifier that improves high-frequency sounds while reducing interference from low-frequency noise. Includes hearing-aid-compatible handset with Caller ID* and Call Waiting Caller ID* capability and vibrate alert mode; up to two additional handsets can be added. Each handset has advanced tone control for calls that are crisp and clear, easy-to-read backlit keyboards, and 2.5mm jacks for use with your external earpieces. The ringer can be amplified to 95dB to make sure incoming calls are heard, and an optional vibrating alert pad (available below) can be placed under the mattress or pillow for additional assurance that calls won't be missed. *Telephone subscription required. 3" H x 7" W x 9" L. (2 lbs.)