Easy to pair with most Bluetooth-enabled devices, could connect 2 smartphones at the same time and answer calls from either one. 270° Rotatable flip-boom arm allows you to adjust the angle and fit this headset in right or left ear perfectly. Designed with Ergonomic appearance. New in-ear design, snug and secure, comfortable to wear, will not cause ear swelling. After thousands times change, we design a beautiful multi-functional big button, one button control, press easily and operate conveniently. DPS Intelligent Noise Reduction, built in HD microphone, Bluetooth 5.0 audio decode technology, provides pure, high quality sound for compatible devices. Built-in large-capacity battery, supports up to 10 hours of talking time and 300 hours standby, based on a single full charge which only takes about 2 hours. Enjoy your hands free calls and music, easy and safe to use when driving, make your life more high-efficiency.