NOISE REDUCTION HEADPHONE #ANC-J2

Product Features: 1.It has built-in the high quality noise cancelling circuit inverting precision, with the 23db noise level, and it can effective to cut off 95% background noise. 2.It can prevent the disturb of the AC power supply. When the phone is charged, PC will not have any current sound. 3.Background noise nearly to 0. It can solve the big problem of troubling the biggest slient background noise of the noise cancelling headphone. 4.The noise cancelling diamater is 40mm