Iqua Headset BHS-701 . Wireless range: 10 m, Bluetooth version: 1.2. Headphone frequency: 20 - 20000 Hz. Battery technology: Lithium Polymer (LiPo), Talk time: 12 h, Standby time: 350 h. Dimensions (WxDxH): 140 x 166 x 53 mm, Weight: 83 g. Operating temperature range (T-T): -20 - 55 °C