Desktop phone with Caller ID, last 30 numbers memory Phonebook with 80 memories Lighted Keypad 3 one touch memory buttons Ringer light blinks on incoming calls Automatic redial, last 10 calls memory Tono dialing (DTMF) R button for PBX & value added services Mute button On hook dialing Ringer volume control: high or low Ringer on/off 8 ringer melodies Phone conversation time counter In use indicator Desktop or wall mountable Phone line powered, no need of batteries