Single-line memory phone with unique high-frequency volume control. Ideal for people with partial hearing loss. Helps high-frequency hearing loss by making words clearer, not just louder. Features: Clarity Power: increases the volume of high frequency sound, with less than 1% distortion, so words are clearer and easier to understand Clarity Power Control Slide Bar--Amplifies high-frequency sounds in the telephone’s receiver. It allows sound to be customized to compensate for the individual’s specific level of hearing loss Amplifies volume: more than 30 times louder than a conventional telephone. Has a certified minimum gain of 26dB, much higher than the minimum level of 12dB required by the FCC for amplified telephones Customizable, loud ringer: lets you adjust volume (up to 80dB), frequency, and speed of ring; ideal for those with high frequency hearing loss Visual ringer: light flashes brightly when phone rings Powered entirely by phone line: works even when electricity is off; no batteries or electric cord required Special one-touch emergency "help" button: you can program to dial 911 or other emergency services FCC regulations require all amplified telephones to revert to normal volume each time you hang up. With one touch, the Boost button returns your Clarity Power telephone to the amplification level you set the last time you used it. 10 one-touch programmable memory keys for frequently called numbers of up to 32 digits Last Number Redial Button--Permits automatic redialing of the last number dialed Extra-Large Black Keys--Makes dialing easy Tone/Pulse Switch--For selecting dialing mode Braille Dot--Dot on number five key helps with keypad orientation 3.5mm jack for monaural output for assistive listening devices Recall & Mute Functions Hearing Aid Compatible Handset Line Signal Indicator--You can “see” a dial tone or busy signal Powered entirely by phone line; works even when electricity is off; no batteries or electric cord required