The Ameriphone VCO Amplified Phone with Voice Carry Over is designed for people with severe hearing loss or deafness that still want to use their voice VCO is the Read & Talk phone, just speak into the handset and read responses on the display screen. Voice carry over calls must be placed through toll-free relay service Programmable relay service speed dial button Programmable emergency button transmits user's name, address and phone number in text for quick response by emergency services Programmable preset text message for quick VCO calling, no typing required Volume control up to 26 dB, so anyone in the family can use it Handset is hearing aid T-coil compatible Built-in answering machine for text messages, also works with your voice answering machine Built-in Port: Works with Large Visual Display and Portable Printer 12 programmable memory dial buttons Adjustable super loud ringer and bright visual ring flasher Easy-to-see oversized keypad buttons Battery back-up (battery not included) Redial, hold and flash buttons Audio output jack (3.5mm) for assistive devices Voice Carry Over (VCO) is a free service from the state. Relay operators can be reached by dialing 711 from any touch tone phone. Ameriphone / Clarity Part#: 76566.000