Bluetooth Wireless Technology: Adopt 4.2 bluetooth tech, ultra long distance pairing up to 33 feet, pairing and connecting only takes a few seconds. Headphones are connected with devices synchronously, wireless with great quality of stereo sounds and reduse noise by fantastic TWS (True Wireless) technology Easy to Pair & Wide Compatibility: Simply one press to answer or reject phone calls, Bluetooth pairing, power on and power off, pretty easy to use This wireless earbuds is designed according to the geometry of the ear. The ergonomic design make these earphones provide all-day comfort and stay put in ears while you're running, jogging, weight lifting, walking and gym training. With Bluetooth 4.2 technology, our Bluetooth earduds pumps out the deepest bass soaring highs and ultra-clear midrange. Professional design provides powerful bass enhanced sound with superb musical details. Excellent dynamic unit enhances the high-definition sound. Allow hands-free calls while driving or music streaming without having to control through your phone or electronic device; In-line remote control with Play/Pause, Hands-Free Calling, Next music function. Almost compatible with most Bluetooth enabled devices, such as smartphones, tablets, PC and TV.