Mpow Cheetah Bluetooth Headphones, V4.1 Wireless Sport Headphones, Sweatproof Running Headset with Built in Mic for Workout Exercise (IPX5 Splash Proof Rating, aptX Stereo, Up to 8 Hours of Talk Time) NANO-COATING SWEATPROOF TEACHNOLOGY: For protecting against sweat and moisture, Mpow Cheetah headphone has adopted Nano-coating sweatproof technology, which prevented sweat, rain or water from permeating electrical components that might lead to erosion damage. BEHIND-EAR ERGONOMICS DESIGN: Mpow Cheetah's stylish streamline design guarantee 100% stable and comfortable user wearing experience perfect for heading to the gym. LIGHT AS FEATHER: Memory titanium wire material, soft, lightweight, comfortable, flexible but no distortion, these all helps users feel like nothing on their back head in action. Also, the headset will huddle up automatically that is quite flexile. APTX STEREO SOUND: AptX technology is designed to solve the bandwidth and latency barriers, delivering near CD-quality sound wirelessly over Bluetooth connections. Hence, with aptX technology compatible, Cheetah is delivering superior audio performance in music and calls. EXTRA-LONG PLAYING TIME: The upgraded battery capacity allows you enjoy over 8 hours talking/playing time and 180hours standby time. Go ahead and wear Mpow Cheetah all day.