Iqua Bluetooth Stereo headset BHS-701silver. Wireless range: 10 m, Bluetooth version: 1.2, Bluetooth profiles: A2DP, AVRCP. Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 103 dB, Acoustic system: semi-open. 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, Storage temperature range (T-T): -20 - 55 °C