The Clarity Telephone is an amplifier telephone designed with adjustable frequency range for individuals with high frequency hearing loss. Set the control to the frequency that is easiest to hear and hard to hear voices come through loud and clear. There are four models available. All models have the following features: visual ringer light; low-frequency ringer; hearing aid compatible; tone/pulse switch; desk/wall mountable; and increase volume to 25 dB. Model 1000 is the home version with mute, redial and one touch memory buttons. The Basic, model 2000 has no advanced options. The Clarity 3000 is the Feature phone with mute and redial buttons, and memory. The Clarity Speaker Phone, model 4000, has the addition of a two line feature. It has memory, mute redial and flash buttons as well as conference and hold features.