- DECT 6.0 Digital Technology - Intercom Between Handset and Base - Call Transfer Using Intercom - Use up to 4 Cordless Handsets on a call - Energy Star Compliant - Hearing Aid Compatible - English/Spanish/French Setup Menu - RoHS Compliant - Handset Speakerphone - 10 Speed Dial and 10 Intercom Number Locations - English Spanish French Setup Menu - Base Speakerphone - Voicemail Waiting Indicator (COVM) ** - Flash - Mute - Conference Between an Outside Line and up to 4 Handsets - Corded Base and Cordless Handset - Ajustable Volume - English/Spanish Voice Prompts (For US version) - Equalizer For Customized Audio - Choose from 4 preset profiles - Handset Volume Control - Data Port - Chain Dialing - Power Failure Operation on all 4 Lines (9v battery required) - 200 Name/Number Phonebook Directory - Last 20 Number Redial - Ringer Volume Control - 2-Line Operation - High Contrast White Backlight in Handset and Base