LINDY Active Noise Cancelling Headphones combine world class technology and user-friendly design to deliver intelligent audio experience. Incorporated with inverse phase active technology and 40mm driver units, they offer crystal clear audio while cancelling out background noise for a truly immersive sound quality. These headphones have soft cushioned ear pads that settle comfortably over your ears for extended use. They are come with 6.3mm stereo adapter as well as an in-flight adapter. Powered by a 1x AAA battery.