Painless hanging design, no need to put into ear, avoid ear disease and ear pain, comfortable to wear. Release your ears to listen to the world, far away from dangerous, suitable for outdoor activities. Wireless BT5.0 technology ensures transmitting stable signals in high quality and high speed. Built-in rechargeable 85mAh Lithium battery lasts 8-10 hours of playing time per charge cycle. High-quality Microphone grasps the detail of voice and enables hands-free calls during exercise or driving.