Description: The headset features CVC noise reduction for audio from mobile phones, laptops and other devices. After pairing with PC , it can play various audios of the computer, and can also be used for voice chat. Wireless design is not winding, easy to wear, free movement, not easy to fall. Headset design has the phone answer key, pause the play button, easy to switch use. Continuous call about 6 hours+continuous play time about 5 hours, let you enjoy freely. USB charging, easy to use. Specification: Model: LF-V9 Color: Black Version: 4.2 Adapter Output: DC 5V 150mA Battery Capacity: 220mA Impedance: 8 Frequency Range: 20-20KHz Headset Circumference: 370mm Charging mode: power adapter output (DC5V 150mA) Support protocol: Head set/handsfree/A2Dp/AVRCP Standby time: about 10 days Continuous call duration: about 6 hours Continuous playback time: about 5 hours Package Includes: 1 Piece headset 1 Piece USB 1 Piece User Guide 1 Piece Adjustable Headband