Features: [Ear-free Keeping Danger Away] Releases your ears to listen the world, you can response to the surrounding situation quickly, far away from dangerous, suitable for many indoor and outdoor activities. [More Comfortable and Healthier] The sound is transmitted through the bone to auditory nerve, no eardrum damage, healthy, scientific and comfortable, very beneficial for child, the young and the old to avoid ear damage, also suitable for people who has trouble in listening. [Keeping Ear Disease Away] Bone Conduction Sensor: Wearing in the temporal bone of the ear, no need to put into ears, easy to clean, avoid ear disease caused by harmful bacteria in air and sweat when listening music. [Super Sound Quality] Latest Wireless BT 4.1 Technology with A2DP/ AVRCP support, ensure transmitting strong signal in high quality high speed and offering high-fidelity stereo music. In additional, built-in high-performance Powerful Speaker and High-sensitivity Microphone offers you wonderful sound quality and clear communication effect. [IPX4 Waterproof Design] IPX4 Waterproof design immerse you in sports and music, no need to worry about sweat. Suitable for walking, hiking, running, climbing, skating, driving and other activities. Offers Much More Convenience: *Long Standby Time Fully Compatibility Built-in rechargeable Lithium battery lasts up to 8 hours of Talking Time / 6 hours of Music Playing Time and 120 hours of Standby Time per charge cycle. And universally compatible with most BT-enabled devices, including iOS / Android / Windows Smart phones Tablet PC and other BT-enabled devices. *Enjoy wireless music, easy to switch between music and hands-free calls, you will not miss any incoming calls whilst listening to music. *Creative ergonomics design, balanced wear, tight on the ear. *Light and Portable, comfortable to wear, and adopts skidproof earhook design which guarantying 100% Stable and Comfortable when walking, exercising, running, climbing, skating, cycling and other indoor outdoor activities.