Whistler Motorcycle Bluetooth Headset. Wireless range: 10 m, Bluetooth version: 2.0+EDR. Battery technology: Lithium Polymer (LiPo), Talk time: 14 h, Standby time: 180 h. Dimensions (WxDxH): 44.45 x 84.07 x 20.57 mm, Weight: 51 g. Frequency range: 2.4 - 2.4835 GHz