Hear clearly. The C4230 uses DCP technology and 50 decibels of intelligent amplification to make conversations louder and clearer. Featuring dual speaker phones and a digital answering machine, the C4230 is a feature-rich solution for those with a moderate-to-severe hearing loss or low vision....

The Clarity Professional C4220 uses DCP and 50 decibels of intelligent amplification to make conversations louder and clearer. Featuring a handset speaker phone, back lit buttons and a white LED screen, the C4220 is ideal for those with a moderate-to-severe hearing loss or low vision....

The Clarity Professional C4205 featuring our revolutionary new Digital Clarity Power technology makes soft sounds audible, while keeping loud sounds bearable. DCP intelligently amplifies the human voice, eliminates distracting echoes, reduces noise and suppresses sharp, sudden sounds in telephone conversations....

Increase your productivity and comfort. Using a telephone and headset solution can increase your productivity by allowing you to handle other tasks while talking on the phone. Additionally, the use of a headset can reduce neck, upper back, and shoulder tension allowing for a more comfortable work environment....

This complete single-line telephone comes with a unique convertible headset: use it as a traditional over-the-head headset or as an over-the-ear headset that won't muss the hair or intrude into the ear canal. Includes modular connection, on-line indicator, headset stand, volume and tone control, flash, redial, mute and ringer sound adjustment....

The T20 is a complete, dual-line telephone with an ergonomically designed, convertible headset. Includes all the features of the T10 single-line headset telephone....