Four Pack of Two Channel Folding Adjustable Universal Rear Entertainment System Infrared Headphones With Four Additional 48" 3.5mm Auxiliary Cords Wireless IR DVD Player Head Phones for in Car TV Video Audio Listening With Superior Sound Quality 4 Pack of 2 Channel Wireless IR headphones to enjoy in car listening without the hassle of cables 3.5mm Auxilary port. Allows plug in use on any Ipad/Pod, MP3 devices that uses a 3.5mm auxillary cord (4 cords included) Automatic shut off prevents batteries from draining when left on Headphones fold for easy compact storage These will not work if your screens are in the headrest and they are not Bluetooth Headphones. For IR systems only.