G-Cord(TM) Bluetooth 4.0 Headphones, Wireless Stereo Sports Headsets, Running Gym Exercise Sweatproof Earphones, Earbuds with Built-in Mic for Hands-Free Calling Wireless Bluetooth Headphones with Advanced Bluetooth 4.0 technology provides high-fidelity stereo music and clear speech within 10 meter Sweatproof Portable and Light weight Bluetooth Headphones,unique flexible and comfortable design avoid any pains after hours of wearing and 3 ear tips of different size ensure you get it perfect fit and remain stable in your ear Built-in HD Microphone with noise cancellation,ensure Hi-Fi Stereo Music Sound and Strong Signal. Let you get high quality and clear voice even in noisy environment like inside a gym and running/cycling on the road Compatible with iPhone 6S, 6 Plus, 5, 5S, 4, Android Phone and other Enabled Bluetooth Devices Long time batteryup to 8 hours of talk/playing time and 320 hours standby, let you enjoy your music through a variety of activities