•[Adaptive (Auto-optimization)] is turned ON: It continuously adjusts to your ears and surrounding environment, ensuring that noise cancelling is always at its most effective level. (You cannot adjust the level of external sound control.)
•[Adaptive (Auto-optimization)] is turned OFF: You can adjust the level of external sound control.
Noise Cancelling: The closer to Max (100), the more noise is removed.
Ambient Sound (Transparent): The closer to Max (100), the more external sound is transmitted.