Features: 2 line x 24 character backlit display, programmable buttons with dual LEDs for line or feature appearances. 16 2 integrated fixed intercom buttons, conference, transfer, hold and speakerphone buttons. Hands-Free Answering Intercom (HFAI) Full-duplex speakerphone, volume control buttons, message waiting light, integrated auxiliary port for connecting point/ring devices such as single-line machines and answering machines. Adjustable machine desk stand that can be adjusted to 3 different levels for wall mounting, compatible with Partner, Partner Plus, Partner II or Partner ACS NEW TOPS, NEW PARTNERSHIP, No yellow keys, like new