Support IOS system Sweatproof and anti-falling With smart touch Sports headphones, more sports, more freedom. Bluetooth touch Strong battery life, ergonomic ear hook design Adopting safe TwistLock™ technology and FlexSoft™ technology ergonomic earplugs to ensure comfortable wearing and not easy to fall off. Twist lock technology, wireless Bluetooth 4.1. 8 hours of strong battery life, 2 hours of charging, 8 hours of music time, 8 hours of talk time. Sweatproof design - designed for sports Grip 500 headphones are rainproof, waterproof and sweatproof, suitable for wearing in most sports environments. Smart touch technology.one-sizeABS