37 Jabra 920 Wideband speaker with noise cancelling microphone Supports both headband and earhook wearing styles Up to 8 hours of talk time (full charge in less than three hours) Range of up to 120 meters (350 feet) from base to headset Headset features volume, mute, and pick-up/hang-up buttons Auto sleep mode for energy conservation (up to 36 hours) Wireless Headset