Caller ID/call waiting1-50 name and number caller ID history High-contrast backlit LCD and lighted keypad Quiet mode Visual ringing indicator Talking digits DECT 6.0 digital technology Intercom between handsets Conference between an outside line and up to 4 cordless handsets 50 name and number phonebook directory 9 number speed dial Compatible with AT & T cordless headset2 Voicemail waiting indicator3 Quick access key for voicemail box Last 10 number redial English/Spanish/French setup menu Mute Any key answer 1Use of caller ID feature requires a subscription from your telephone service provider. 2This telephone system is compatible with certain AT & T DECT 6.0 cordless headsets. Refer to the accessories page under the shop tab for a list of compatible cordless headsets. 3Use of voicemail features requires a subscription from your telephone service provider.