2 Line Caller ID Phone, 2 PSTN Line switchable, 2 phone numbers, best selection for business/office use 2 Line Caller ID Phone Pulse/tone dialing2-Line FSK / DTMF dual system caller ID2-Line call-in and dial-out number displayed, store, review2-Line 12 digits LCD display2-Line call-in ringing volume HI/LO/OFF switch10 group two-touch memoriesHands-free speakerphoneMusic on-hold IDD Lock