Nokia BH-111. Interface type: 3.5 mm, Wireless range: 10 m, Bluetooth version: 2.1+EDR. Ear coupling: intraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Battery technology: Lithium Polymer (LiPo), Battery capacity: 120 mAh, Talk time: 7 h. Dimensions (WxDxH): 48 x 37.6 x 12.8 mm, Weight: 15.5 g. Operating temperature range (T-T): -15 - 55 °C