Become immersed in your music with the ifidelity Bluetooth Headphones w/Active Noise Cancellation. These headphones deliver premium stereo sound up to 16 hours at max volume. When the active noise cancellation is turned on it will block out up to 20-22db of sound. Allowing you to enjoy your long flight, train ride, or day in the office without any disruptions and in comfort with the memory foam earpads. The built in music controls and microphone allow you to control your audio and answer a call without reaching for your phone. With a collapsible and flexible design the headphones can be carried in the provided EVA carrying case or around your neck. Music can be enjoyed through Bluetooth or with the provided 47’ 3.5mm Aux Cable. Playback time at max volume with ANC On: 8hrs. Charging Time: 3hrs Bluetooth Version 4.0. Micro USB Cable provided. Bluetooth working range is 10 meters (33 feet).