Bluetooth Headphones, Bluetooth V4.1 Wireless Stereo Sports Sweatproof [In-Ear] Earphones Headset With Magnetic Attraction for Running Gym Exercise with Microphone (Rose Gold) [Light, small, barrier-free to wear] Selected aluminium magnesium alloy material, only with weight 15g,reduced 30% on the dimension. no heaviness. With thousands of samples and testing for the best wearing angle and the most comfortable user experience, also ensure the stability during the sport to avoid the fall-out. [Smart Magnetic Bluetooth Headphones] MAGNETIC ADSORPTION design, the earplugs can be magnetically touched back to back for switch off, Split of them for switch on. Much convenient. With hands free function makes more fashion and more convenient. [10 Hours of Music + Calls] Sufficient battery could work last for 10 hours of music and calls. 120 mAh batteries double power than other common items. It would last 5 days if only with the general using. [Hi-Fi Stereo MusicSoundandApt-XLosslessMusic] High quality sound. Bright and Vivid voice without noise [Easy Connection] Easy to be connected wireless Bluetooth headphones. Even could be connected automatically later after the first match. iPhone and part of Android phones could show the battery volume.