Lightscastle Magnetic Wireless Bluetooth 4.1 Sweatproof Sports Headphones w/ Mic / Noise Cancelling Stereo Earbuds Actual Battery Duration 7 Hours - Silver+White 1 Intelligent Magnetic Design: End of earplugs attached magnet, adsorption together to form a ring, without the worry of loss when you wear it during daily activities. Connecting the earpieces together will stop playing the music or disconnect the call,separate the adsorbed earplugs to answer. 2 Outstanding Stereo Sound: Sports Headphones built-in HD Mic with CVC6.0 noise cancellation,ensure Hi-Fi Stereo Music Sound and Strong Signal. Let you get high quality and clear voice in noisy environment like inside a gym and running on the road. 3 Advanced Technology: Adopt latest Bluetooth 4.1 technology,with A2DP and APT-X headset, compatible with iPhone 6S 6 plus 5 5S 4S iPad, Samsung Galaxy S6 S5, LG G4 G3 and other bluetooth devices. 4 Long Battery Life: Bluetooth Earphones built-in high-capability rechargeable lithium-ion polymer battery, about 6-8 hours continuously use time, 2-3 hours charging time, 200 hours standby with a single charge ,provide you less time charging and more time for running. 5 Easy Connect: Bluetooth headphone allows pairing with two mobile devices simultaneously. Operating range up to 33ft/10 meters that you can answer your business or personal phone with ease.