Nokia BH-112. Wireless range: 10 m, Bluetooth version: 2.1+EDR, Bluetooth profiles: HFP, HSP. Ear coupling: intraaural. Battery technology: Lithium Polymer (LiPo), Battery capacity: 50 mAh, Talk time: 5 h. Dimensions (WxDxH): 40 x 20 x 25 mm, Weight: 8.1 g. Operating temperature range (T-T): -15 - 55 °C