This phone features talking keys and talking caller ID with a large back lit easy to see display. Amplified speakerphone up to 15db, 95db loud ringer with camera LED ring strobe flasher, and 3-level Speech Output Control adjusts outgoing voice volume up to 12dB. Exclusive 4 position positive hold tone adjuster helps keep the tone adjustment from accidentally moving. You can mount this phone on the wall or sit it on a desk. It is hearing aid compatible plus has a 2.5mm and 3.5mm audio jack for headset, neck loop, t-hook silhouette, or patch cord. 9 one-touch memory dial buttons: 2 emergency, 6 standard and 1 for customer service (instant contact to our world class customer service). Battery backup with rechargeable batteries included.