Special Features:

Amplifying telephone, designed for hearing impaired, hearing aid compatible, low frequency ringer, control slide bar to amplify high frequency sounds, noise canceling mute button, large dial buttons, glow in dark numerals when handset lifted, braille dot for keypad orientation; 13 one-touch memory keys for numbers; adjustable ringer, ringer switch, last number automatic recall; desk/wall mountable

Properties:

An item specifically designed to convert sound into variations of an electric current and to reconvert similar variations into their original sound with sufficient accuracy for clear intelligibility. It consists of a telephone transmitter, telephone receiver, and a switch and is primarily used for voice communications. Includes pedestal type, cradle type and hang-up type telephones. Does not include separate handsets or head and chest sets.