**Crystal Clear Sound*:Latest Wireless 4.1version with multi-point technology,simultaneously connect with 2 mobile devices with high quality and high speed signal transmitting,offering impressive crystal clear stereo sound with the 32.8ft maximum distance connectivity. Adopt high-sensitive microphone with CVC noise cancellation technology to reduce ambient noise,grasp the details of voice and offer crystal clear sound even in a noisy environment. **User Friendly and Multi-use*:Featured with MFB(Multiple function button) Button and+/-(Volume/Track adjustment) Button,simply and quickly fulfill almost all functions like answer/end a phone,play/pause,pairing,power on/off,etc. Easy operation and brings you much convenience. **8 Hrs Unstoppable Music and 2 Hrs Fully Charged*:Inbuilt with 110mAh rechargeable battery and equipped with USB charging cable,8 hrs unstoppable HD sound music while only 2 hrs fully be charged. **IPX7 Waterproof and Widely Use*:IPX7 Water-resistant Nano-coating efficiently protects sport earphones from sweat and ensures more guaranteed life span. Enjoy music freely in outdoor thanks to its IPX7 Waterproof design. Optimal for running,jogging,hiking,yoga,exercises,gym,fitness,traveling,etc.. **Snugly Fit and Stable Wearing*:Adopt soft ear tips,20.87inches clamp loop and auricle-shaped hook,adapt to ear canal to provide a perfect seal and snug fit to wear your earphones in place. Closely fit and never worry about falling out of your earphone even when you are running.