Digital Key Phone • Programmable Keys: 20 (4 Context Sensitive Keys, 16 DSS Keys) • Display: 240×64 Pixels Graphical LCD with Backlit • Color: Black • Compatible PBX:All Variants of SARVAM & ETERNITY Series • Polyphonic Ringtone, Full Duplex Speaker Phone, Hold, Conference, Redial, Transfer, Message Wait Lamp, Ringer Lamp