Qy8 upgraded version: Our qy8 Bluetooth headphones featuring latest Bluetooth 4.1 and apt-x + EDR audio decode tech</br>Perfect hi-fi sound: cvc6.0 apt-x audio decode tech intelligently filters ambient noise to ensure clearer sound for calls and music playing</br>Stable in-ears design: our Bluetooth wireless headphones unique flexible lightweight design snug and secure interchangeable ear hook</br>Excellent battery performance: the polymer 80mah battery supports approximately 7 hours of playing/talking time</br>Pair with any 2 devices: Our Bluetooth headphones can pair with 2 different Bluetooth devices simultaneously</br></br>Product Description</br></br>COULAX believe in belief advanced Bluetooth v4.1 advantage the latest Bluetooth v4.1 improves apt-x + EDR audio decode technology so that the powerful audio and stereo music are strengthened. You can enjoy the original quality music in deep bass. The updated Bluetooth technology provides strong signal quickly and easily connecting with Bluetooth capabilities within 33 feet. Simple power button designed there is a moderate cycle button on one side of earphone and just press the button for 3 seconds until the blue LED activates. Moderate weight and comfortable designing COULAX qy8 headphone is designed with a moderate/light weight featuring comfortable earbuds hoops to stay over your ears keeping them in place sweat proof and noise cancellation for athletic enthusiast when doing active sports?? such as ru