DESC: calling Features: Call Blocking, Caller Id, Silent Mode, Mute, Phonebook, 4-line Conference Call, Hold Button, Flash Function. telecommunication Features: Handset Paging Locator, Any Key Answer, Handset To Handset Intercom, Caller Id, Voice Mail, Volume Control, Wall Mountable, Last Number Redial, Speakerphone. answering Machine Features: Light-up Message Alert, Call Screening, Digital Answering System, Remote Access. display Features: Color Lcd, Clock, 3-line Lcd Screen, Lcd Display, Digital Display, Call Timer, Backlit Lcd, Date And Time. wireless Frequency/band: Dect 6.0 Plus.