1, active noise cancellation headphones are open key, now the TWS headphones say that there is ANC active noise cancellation, but there is no switch, the head is basically there.
2, active noise cancelling earphones will have noise cancelling switch, shell Prince - Mo earphones, touch the left ear twice to switch the noise reduction mode, there will be voice prompt. In actual use, the noise reduction effect of the headset is very obvious, and after opening the noise reduction in a noisy environment, the singing can be clearly heard, and the surrounding noise is isolated. In addition, the delay is very low, whether it is watching TV or playing games, you can basically feel the delay, and other headphones compared, the effect is very significant, and the headphones sound quality is good.