The Clarity Amplified Big Button Phone with Braille Features – Powerful 35-37dB amplifier – Jumbo keys with Braille characters – Electronic voice repeats each number as it is dialed – Separate volume and tone controls – 10 number memory speed dial keys are announced in either a pre-recorded voice or in your own voice – 3 number one-touch programmable emergency keys – Hearing aid compatible – Super bright ring flasher – Super loud ringer with adjustable ring tones (up to 85 dB) – Audio output jack for assistive listening devices – Battery back-up saves stored memory numbers in case of a power outage – Redial/electronic hold/mute/pause – Signal processor minimizes unwanted background noises and enhances speech clarity – White with large black and white buttons.