Phonebook 16 one-touch memories. Volume control. 9 ring tones. PBX Message waiting function. LCD Display powered by line-cord / PBX. Hearing aid compatible. 5 redial memories. Wall mountable. Mute function. Data port. 1 year warranty. Group listening. Headset outlet. Tough enough to with stand intensive business, the Doro AUB300 is easy to use and offers long-term reliability with out compromising on features. Compatible with most switchboards, RJ45 & BT line cord included.. Handsfree speakerpho