1. Dual Driver ! Dual Speaker! Make music more pleasant. 2. Sweat and splash proof can let you enjoy outdoors activities 3. CVC intelligent noise reduction to provide high quality music 4. Music play time is about 4.5-7 hours 5. Talking time is about 5 hours, enhance greatly the time of use 6. Can display bluetooth power on your IOS device, Support multi-point connection 7. Use: For iPhone Android Mobile phones, Portable Media Player, Sport.