NATURALLY BALANCED SOUND: advanced APTX and CVC6.0 noise cancellation offer the realistic human and bass sound enjoy the best music without any interference from the outer world.</br>STABLE AND COMFORTABLE FIT: Streamline design guarantees stable and comfortable wearing experience high end polished metal case headphones looks exquisite and compact.</br>ULTRA LONG STANDBY: with powerful & fast recharging battery it can deliver up to 8 hours of play time with a single charge or 110 hours of standby time.</br>BLUETOOTH 4.1 CONNECTION: Outstanding connection range up to 33ft for seamless syncing to your favorite wireless devices. Built in Mic functionality that you can talk with headphone.</br>PAIR WITH 2 DEVICE: The Bluetooth earbuds pair with 2 different bluetooth devices simultaneouslyThat you can use two cell phones without having to switch headsets every time.</br></br>Product Description</br></br><b> COULAX - Technology You Can Believe In</b> <br> <br> <b>Designed for Sports</b> <br> The flexible over-the-ear hooks help you hold the earbuds firmly without falling out while<br> exercising. Equipped with different sizes of earbuds?? it offers you secure and snug fit.<br> <b>Long battery performance </b> <br> Battery is built-in 55*2mAh lithium-ion polymer that contributes COULAX headset stand-by up to<br> 110hours and playtime up to 8 hours?? and full charge takes about 1 to 2 hours. <br> <b>Cable-free Audio</b> <br> Built-in Mic allows you make hands-free calls easily. The CVC6.0 noise-cancellation technology<br> ensures clear speeches even in noisy environment. <br> <b>High Quality Sound</b><br> Featu