Features: 2-line x 24 character backlit display programmable buttons with dual LEDs for line or feature appearances 16 2 fixed intercom buttons Built-in conference, transfer, hold, and speaker buttons Hands-free answer on intercom (HFAI) Full duplex speakerphone Volume control buttons Message waiting light Built-in auxiliary port for connecting tip/ring devices like fax machines, single-line telephones, and answering machines Adjustable desk stand that can be set to 3 different levels Wall mountable Compatible with Partner, Partner Plus, Partner II, or Partner ACS NEW TOPS, NEW HANDSETS, NO YELLOW KEYS - LIKE NEW