Nokia BH-109. Wireless range: 10 m, Bluetooth version: 2.1+EDR, Bluetooth profiles: HFP. Ear coupling: intraaural. Battery technology: Lithium Polymer (LiPo), Battery capacity: 90 mAh, Talk time: 8 h. Dimensions (WxDxH): 61.8 x 17.4 x 6.9 mm, Weight: 9.1 g. Compatibility: Telephone, Volume control: Digital