Jawbone JBT03-UK. Interface type: Micro USB, Wireless range: 10 m, Bluetooth version: 2.1+EDR. Acoustic system: clip-on. Battery technology: Lithium Polymer (LiPo), Talk time: 4.5 h, Standby time: 216 h. Dimensions (WxDxH): 14.1 x 53.6 x 24 mm, Weight: 11 g. Operating temperature range (T-T): 0 - 55 °C