Features: Automatic Quick Pairing.Upgrade BT 5.1 technology offers automatic boot pairing,and make BT connection faster and more stable. Superior Sound Quality.HIFI sound quality and wireless noise reduction let you enjoy shock bass and surging sound effect. One Key Easy Operation.Adopt one-button blind press design, avoid poor touch-control,and make it easier and simple to operate. Comfortable Wearing Experience. Made of soft and skin-friendly material with ergonomic design,it can avoid swelling and pain, quite comfortable to wear. Convenient Multi-function Button.Enjoy easy call answering,call hang up, call rejection and music control with multi-function button. Waterproof Sweat-proof.No worry about getting wet or damage while dealing with water activities. LED-digital Intelligent Display.Equipped with digital intelligent display, it can provide real-time battery power display. High-capacity Battery.With large battery capacity,you can enjoy 40-hour standby time,5-hour call time and 4-hour play time after a full charge.