Accessory handset only—requires a DS6641 series phone to operate Backlit keypad and display ECO mode power-conserving technology Quiet mode DECT 6.0 digital technology Message retrieval from handset 50 name and number phonebook directory Intercom between handsets Conference between an outside line and up to 2 cordless handsets Voicemail waiting indicator Last 10 number redial Mute Any key answer Volume control Trilingual prompts—choose between English, Spanish and French