2.4 GHz Digital Spread Spectrum. 4 Handset Capability. Digital Answerer Caller ID/Call Waiting - Displays the name and number of the caller in Call Waiting even while you are on the phone. Base Keypad. Handset Speakerphone. Base Speakerphone. Handset to Handset Call Transfer. Trilingual Answering System. Trilingual Function Menus. DirectLink Technology.