Accessory handset expands AT&T TL92271 and TL92371 answering systems. DECT 6.0 digital technology delivers unsurpassed range and clarity. Push-to-Talk feature provides instant and easy communication between handsets. The HD Audio takes sound quality to the next level. Caller ID Announce lets you hear the name of the incoming caller so you don"t have to look at the phone. Handset allows you to use up to four handsets on a call, intercom between handsets, call transfer using intercom and on-hook dialing. Handset also features a speakerphone, Caller ID/Call Waiting, 50 name/number Caller ID history, ring volume control and last 10-number redial. Setup menu is in English, Spanish and French. Handset includes a charger, AC adapter and battery pack.