JOWAY Intelligent Wireless Bluetooth V4.1 Stereo Headset HD Voice In-ear Headphone Mini Universal Earphone(Black-1) The noise-isolating design and CVC6.0 tech ensures that you can enjoy music, engage in mobile gaming and have a phone call even in a noisy environment. Smart Bluetooth wireless binding, signal stability, further transmission distance, let the music move you and enjoy the music freely. Adopt top CVC6.0 strong noise canceling technology. Eliminates the white noise and delivers a clean audio experience offering hours of pure enjoyment. High-fidelity stereo with deep bass sound effect, you can begin enjoying CD quality stereo sound instantly. High capacity: 90mAh polymer batteries, long standby time, could support calling for 7 hours, playing music for 6 hours.