VTech VC7100 Accessory Cordless Handset, Silver/Black | Requires a VTech VC7151 Wireless Home Monitoring System to Operate Connectivity Technology:Cordless / Wireless Technology:DECT 6.0 / Features:Phone Book Conference Call Voice Mail Indicator Redial Hearing Aid Any Key Answer Mute Volume Control Tri-lingual Menu Eco Mode Backlit Keypad Caller ID Call Waiting Speakerphone / Screen Type:LCD