Jabra/GN Netcom BT2010 black. Bluetooth version: 2.0+EDR. Headphone sensitivity: 13 dB, Driver unit: 13 mm, Acoustic system: clip-on. Microphone sensitivity: -18 dB. Talk time: 7 h, Standby time: 200 h. Dimensions (WxDxH): 22 x 24 x 50 mm, Weight: 11 g