Bluetrek S21 zwart. Wireless range: 10 m, Bluetooth version: 1.2, Bluetooth profiles: Handsfree/Headset. Battery technology: Lithium Polymer (LiPo), Talk time: 11 h, Standby time: 504 h. Dimensions (WxDxH): 62.3 x 11 x 22 mm, Weight: 14 g. LED indicators: Dual colour. Compatibility: Telephone, Volume control: Digital