Bluetooth Blueant handsfree black. Small ergonomic design (only 5.2 cm long). Lightweight (13 grams). Works with any Bluetooth phones including the iphone. Bluetooth power 2.5mW (0.0025W) Max. cordless distance 30 feet (10 meters) Weight of headset .45 oz (12.7g) Standby time 180 hrs Talk time 7 hours Normal re-charge time 1.5 ~ 2 hours Battery type Li polymer rechargeable battery Dimensions 2.04 x 1.02 x 1.10 in (51.8 x 25.9 x 24.94 mm) ideal for voip switch on the fly Note: Talk time and standby time may vary according to different mobile phones.