The ifidelity Bluetooth Headphones w/ANC deliver premium stereo sound. These Bluetooth headphones feature Active Noise Cancellation to block out 20-22db of sound. Enjoy distraction-free music comfortably with the memory foam earpads and built-in music controls and microphone. These headphones feature a collapsible, flexible design and you can carry them in their EVA carrying case. The ifidelity Bluetooth Headphones w/ANC include a Micro USB cable, 47′ 3.5mm aux cable, 10-meter Bluetooth working range and Bluetooth version 4.0. Key Features Active Noise Cancellation blocks up to 20-22db of sound 16 hours of playback time Memory foam earpads Built-in music controls and microphone Collapsible, flexible design EVA carrying case 47′ 3.5mm aux cable Micro USB cable Bluetooth version 4.0 10-meter (33 ft) Bluetooth working range