2.4GHz Digital Technology Cordless, Dual Mode DTMF / FSK caller id system compatible1 Line DOT Matrix and 1 Line 7 Segment LCD Display, Blue White Backlit LCD Display, Illiminated Kepypad50 Incoming Calls Memory, Store 100 Contacts with NameTwo Way Speakerphone with Adjustable volume, 5 Step in call volume control, 6 step ringer volume control5 Ringtones and 5 Polyphonic Ringtones at handset with Volume adjustmentHandset ON/Off, Auto Answer, Handset Keypad Lock / Unlock, Alarm Function, Handset Locator, Tone / Pulse dialing Mode, Redial, MuteOut of Range Warning, Baby call function