Volkano Silenco Active Noise Cancelling Headphones feature modern, Active Noise Cancelling technology to greatly reduce ambient noise when Active Noise Cancelling is turned on. An external microphone on each ear cup detects surrounding noise and processes the signal to create a competing, nullifying signal. This signal is added to your audio playback, eliminating outside noise and ensuring that all you hear is your music. You will hear and feel the difference! Powerful 40mm drivers deliver dynamic bass tones and clean high notes from the comfortable, padded ear cups. The Silenco Active Noise Cancelling headphones ensure maximum listening pleasure, wherever you are. Connect wirelessly when you pair your Volkano Silenco headphones to your mobile phone, tablet, or PC with Bluetooth 4.0 and control your music with the onboard playback control buttons. Or connect with a 3.5 mm aux cable to any device that supports the connection. Noise Cancelling works in both Bluetooth and aux modes.