Features: New-style bone conduction headphone, keeping your ears free for surroundings while listening to music, safe and healthy. Wireless design with excellent stereo sound quality, ideal for outdoor sports like walking, jogging, cycling, climbing, etc. With built-in microphone, allows you to answer incoming call while driving the car, safe and convenient. Adopts BT 4.1 technology, and transmission range is up to 10 meters, easy to connect your smartphone or other device at a long distance away. IPX6 waterproof level, protecting the headphone from any possible damage of sweat or rainwater. High-quality and lightweight titanium material makes it more comfortable to wear, and not easy to cause deformation. With a built-in 200mAh polymer battery and continuous play time is about 6 Hours, and the headphone can be recharged fully by the included USB cable in 2 hours.