GE's black cordless accessory handsets for 28871 and 28861 series phones combines the unbeatable clarity of Dect 6.0 interference free technology with handsfree ease of movement. WiFi friendly unit works with digital answering system in base unit to allow remote message retrieval and functions as speakerphone and intercom. Hearing aid compatible and has backlit LCD display with exploding digits and built in calendar and alarm clock with snooze function. Fully featured with call waiting caller ID with 30 number memory one touch redial speed dialing with 50 name and number directory and selectable ringtones. Comes with AC adapter and is desk or wall mountable. Accessory handset - must be used with 28861 or 28871 series phones.