Patented Clarity Power technology in this phone makes incoming voices clearer and up to 30 decibels louder. Standard phones only adjust for volume, but this phone has a clarity-control switch that amplifies high-frequency sounds and reduces low-frequency noise that causes interference and distortion. A built-in equalizer automatically balances the voice being heard, especially beneficial to those with hearing loss since 95% of all hearing impaired suffer loss in the high frequency range. An amplified ringer and flashing dial pad signal incoming calls. The phone is caller ID and call waiting capable with a 50-number memory, and it has a large text LCD screen. A one-step voicemail access with a message waiting indicator allows quick message retrieval. The hearing aid compatible phone is tone/pulse switchable, connects to single line systems, and can be wall-mounted or used on a desktop. Base: 2 1/4" H x 8" W x 8 1/2" D. (4 lbs.)