CPW65-DECT-Duo ; Two wireless DECT microphones for the CP965 ; Optimal HD voice with 3 built-in microphones ; Full-duplex technology ; Echo cancellation ; 3-metre (10-foot) 360° voice pickup ; Connection distance up to 20 metres with the CP965 ; 11 days of standby and 13 hours of talk time ; Intuitive capacitive mute buttons ; 360° omnidirectional charging on the charging cradle ; DECT technology ; Without power supply ; Optimal HD voice with 3 built-in microphones.