Energy efficient 'Switch Mode' power supply. BT MeetMe menu (service short-cuts). BT services menu (Call Divert, Call Wait etc). Caller ID Display (CL1 Type 1). Clock. Call timer. ELR/TBR switchable. Handset volume control. Headset port. Hands-free operation. Inductive coupler (hearing aid compatible). Incoming voice amplification. 3-line LCD. Message waiting indicator (PBX). PABX compatible. 10 one-touch memory buttons. Pause (for number memory). Ringer volume control. Secrecy/mute button. Tone & Pulse dialling options. Visual call indicator. Last number redials: 10. Name and number directory: 100. On-hook dialling. Wall mountable. Black (dark slate metallic grey). Calling Line Identification (Caller ID): For Caller ID to work this must be activated with your service provider; please check with your service provider that this service is available from them and will work with this device (Caller ID may be associated with an additional fee from your service provider).