Features: With Vibrating Alert Function, hands-free calling, let you won't miss any important calls. Easy to wear clip, with functional clip, carry your conveniently on your shirt. Extra-long talk/playtime, up to 8 hours of talk/playtime, and 180 hours of standby time. Pair two phones simultaneously, enjoy the comfort of pairing two phones at the same time with . Retractable cable technology, after finishing your call, retract your cable with a single push of a button (build-in 30cm cable). Specification: Model: F990 BT Version: 4.0 Battery: 80mAh Standby Time: about 120 hours Talk Time: about 5 hours Power Adapter: DC5V 1A Charging Time: about 2 hours Frequency: 2.4GHZ Color: Black Item Size: 6*3*2.5cm/2.36*1.18*0.98in Item Weight: 20.2g/0.71oz Package Size: 19*10.5*3.5cm/7.48*4.13*1.38in Package Weight: 127g/4.48oz Package List: 1 * Headset 1 * USB Charging Cable 1 * User Manual