Product Specification 1.Model Number:M8 2.Charging Input:USB Cable 3.Features:Featuring the CSR4.1 8635 imported high-end single-chip + CVC6.0 Noise Cancellation 4.Support Voice Control, re-dial latest phone number, Volume control 5. bluetooth headphones are lightweight and comfortable enough to wear 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