Wireless Bluetooth 4.0 Earphones Headsets Support Hands-free Calling, Super Lightweight Stereo Sports Headphones with Great Sound. (Blue) Wireless Bluetooth Earphones-Advanced Bluetooth 4.0 technology with Apt-x/A2DP code. Super clear and nature sound. Fashion and Sports Design. The earbuds head can be adjust 45. Makes you can find the most comfortable wearing state. Quite lightweight sports earphone ideal for Cycling, Jogging for simple casual listing without those annoying cables. Stable and comfortable. Built-in 80mAh rechargeable battery, up to 4 hours music/talking time. Only need to charging 2 hours. Built-in HD and sensitivity microphone. Support hands-free calling. Makes you can enjoy clear and natural sound when calling.