Jabra/GN Netcom BT2070. Wireless range: 10 m, Bluetooth version: 2.0+EDR. Headphone frequency: 300 - 3000 Hz, Impedance: 32 Ом. Microphone sensitivity: 14 dB. Talk time: 5.5 h, Standby time: 200 h. Dimensions (WxDxH): 18.4 x 42.4 x 27.9 mm, Weight: 8 g