AfterShokz Ear Hook Bone Conduction Headphone with Speaker and Calling Function for Sport (AS330)

Features: 1) Open Ear design to keep aware of surroundings. 2) Stereo Bluetooth headset with wireless phone and music functions 3) More comfortable and stable for extended use. How to wear: 1) Place the wraparound head band behind your neck with the transducers resting on the bone in front of your ears, not on your ears. How to charge: 1) Connect Bluez to a standard USB port on your PC or a wall charger via the USB charging cable. Bluez will fully charge in 3 hours. The LED Indicator will show solid red when charging, and will turn solid blue when charging is completed. Note: - It's recommended to charge Bluez before using for the first time. - Bluez is not functional while charging. Specification: 1) Speaker Type: Bone Conduction Speaker 2) Playback Time: Up to 6 Hours 3) Charging Time: 4) Standby Time: Up to 10 days 5) Wireless Range: 10m(33ft) 6) Bluetooth: V2.1+EDR 7) Weight: 43g Package included: - 1 x Headphone - 1 x Cable - 1 x Manual - 1 x Box