Core Features: Optimal Hd Voice With 3 Built In Microphones, Full Duplex Technology, Echo Cancellation 10Foot 3Meter 360 Voice Pickup, Up To 20Meter Connection Distance With Cp9651, 1Day Standby Time And 13Hour Talk Time Intuitive Capacitive Mute Buttons360 Nondirectional Charging On Charger Cradle Dect Technology.