FeaturesiOS / Android compatibleBattery life: up to 30 hoursMicrophone / volume / remote controlNoise-cancelling Bluetooth headphonesOn-ear music controlsBlock out the hustle and bustle of everyday life and become immersed in your music with the Volkano VK-2003-BK Silenco Wireless Bluetooth Noise-Cancelling Over-Ear Headphones.The headphones also feature on-ear music controls, collapsible design and a stylish carry case.Up to 30 Hours Playtime Reduce background noise at work, home or when travelling with incredible Active Noise Cancelling technology. Ambient noise is detected by an on-board microphone and a signal is generated to greatly reduce external noise like aeroplane engines, office hubbub or loud crowds. 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 on-board playback control buttons. Or connect with a removeable 3.5 mm aux cable to any device. Noise Cancelling works in both Bluetooth and aux modes. Answer calls wirelessly when paired to your phone by simply pressing the multi-function button. Once your call is over, your music will resume; no interruptions, no fiddling with awkward controls or having to take your phone out of your pocket. Enjoy up to 30 hours of playtime on a single charge. Your Silenco headphones are the perfect travel companion. A full frequency response range gives you crystal clear percussion and deep bass notes for the most enjoyable listening experience.