2.4 GHz Digital Spread Spectrum (FHSS) - FHSS or frequency hopping technology secures caller privacy while providing long range and crystal clear sound. Caller ID/Call Waiting Deluxe - To activate the Caller ID and/or VoiceMail features, you must subscribe through your local telephone company. Digital Answering System - The product utilizes microchip technology (no more tapes or moving parts.) This ensures clearer recordings and longer life. 2 Extra Caller ID Handsets and Chargers Included Banner Display - Name Each Handset Handset Speakerphone - This feature gives you the freedom to use the handset as a speakerphone. Base Speakerphone - Enjoy the convenience of hands free conversations. Programmable CID or Phonebook Locations Redial Last 3 Numbers Do Not Disturb (DND) - Silence the phone so you can work without distractions. Conference Calling - You can connect lines 1 and 2 for a 3-way conference call. DirectLink Technology - 2-way Radio Communication Mute, Hold, Find Lost HS/Paging Key Advanced Phonebook Features_100 Names - Store up to 100 names, alphabetical search, personal ringers and transfer single listing or entire phonebook New Message Waiting Indicator with Alert Tone Option Intercom or Call Transfer Between Handsets 20 Ringer Options - 10 melodies + 10 tones 10 Speed Dial Locations in Handset Menu Display Languages Trilingual Answering System Room Monitoring Handset Ringer Volume Control Ringer Off Option Wall Mountable Handset Battery Type: BT-1004