BT Version: V5.2 Range: 10m Battery Playtime: Up to 6.5 hrs on single charge; case provides additional 13.5 hrs( ANC OFF) Up to 5 hrs on single charge; case provides additional 10 hrs( ANC ON） Charge Input: Type-C * oraimo Lab test result. Product Features: Active Noise Cancellation- Rule the Quiet Immerse yourself in pure music by turning on ANC mode to block out background noise. Stay focused on your own content. *Testing conducted by oraimo Lab. Noise cancellation level depends on the user's ear shape and geometry, ear tip's size, the angle they're fitted, jaw movement, if you're exercising, and many other factors.