Jabra/GN Netcom BT2045. Wireless range: 10 m, Bluetooth version: 2.1+EDR. Ear coupling: intraaural, Headphone sensitivity: -5 dB, Driver unit: 13 mm. Microphone sensitivity: 14 dB, Microphone input impedance: 6 Ом. Talk time: 8 h, Standby time: 192 h, Charging time: 2 h. Dimensions (WxDxH): 53 x 16 x 25 mm, Weight: 10 g