Push the ANC button on the left ear cup turning on the green LED light and you can enjoy the headphones in Active Noise Cancellation mode
When you don’t need the Active Noise Cancellation function, turn the ANC function of by pushing the ANC button
Active Noice Cancellation can be activated and deactivated even when the TOUCHit Over-ear / SACKit Touch 350 Headphone is turned off. The Active Noise Cancellation will also remain on even when you turn the TOUCHit Over-ear / SACKit Touch 350 Headphone off