Product Specification 1.Model Number:M10 2.Charging Input:USB Cable 3.Features:Bluetooth 4.0,waterproof,high quality sound 4.Color: simple black 5.can ware it when swimming. 6.Charging Time : 1.5-2 hour  7.Playing time: Up to 5-7 hours 8.Ergonomically designed to comfortably fit the contours of your ear 10. Compatible with most of Bluetooth devices,like iPhone Samsung HTC Sony etc. 11.Transmission Distance: 10mPacking :  1* Bluetooth headphone  1* USB charging cable  2* Earhook  1* User Manual