Features:1.Adjustable earhook desigh ensure the earphone fit on different ears and ensure all-day wearing comfort.2.Announce coming caller's phone number,with voice recognition technology you can just say "Yes" to Answer or say "No" to Reject calls.3.Sweatproof technology protects this Bluetooth headset from sweat, and coffee spills, so you can wear It in the office or at the Gym.4.CVC 6.0 noise isolation technology intelligently filter wind or background noises, enable clearer sound experience when calling in crowds, and while listening to music. Specification:Standby time:10 days Talking time:6-8 HoursMusic Time:6-8 HoursCharging Time:<2 Hours