It also has extra-loud and clear speakerphone for hands-free conversations. Large keypad with high contrast numbers helps those with low vision. With up to 40 decibels of amplification, the E814HS is well featured and ideal for those with a severe hearing loss or low vision. The E814HS is an additional handset for the E814CC & E814 models. New DECT 6.0 Technology - Interference Free Communication - Increased Clarity / Enhanced Security - Wider Range / Network Friendly, 1.9GHz Extra Handset / Charger - Dedicated for Cordless Phones by the FCC - 30 Battery Life Increase Over 5.8GHz, Caller ID, Amplified Volume - Up To 40dB, Hearing Aid Compatible, Handset Speakerphone, Large Backlit LCD Display, Large Illuminated Keypad, Bright Visual Ringer, Redial, Mute, Extra Handset Will Only Work With: Clarity E814, E814CC, D702, D703, D704, D712, D713, D714, D722, D723, or D724"