Wideband audio for exceptional sound quality.Volume and mute controls.Bluetooth Version: V3.0 backward compatible.Charges when docked in base.Microphone with noise cancellation.Range of up to 33 ft (10 m).Talk time: 21 hours from 300mAh battery.Stand by time: 500 hours.Visual indicators: LED indicates call status, pairing status, and others.Beep: indicates volume level, microphone mute, and others.