Clarity AltoPlus Extra Loud Caller ID Big Button SpeakerphoneThe Clarity AltoPlus amplified corded telephone is the ideal solution for those with mild, moderate and severe hearing loss. This 53dB phone is the first on the market to receive TIA 4953 certification, passing industry standards for amplified telephones. The ergonomic volume and tone control is also perfect for those with arthritis. Features TIA 4953 certified for mild, moderate and severe hearing loss Amplifies incoming sounds up to 53 decibels