Four Pack Wireless 2 Channel Fold Flat Infrared Rear Entertainment System DVD Player IR Headphones For In Car Listening With Case and 3.5mm Auxiliary Cord.Note: Will Not Work on 2017+ GM's or Pacifica Each Headphone comes with a matching durable case and Auxiliary cord 3.5mm Auxiliary port with cord to also use on any device with a Standard Headphone Jack such as a smart phone, tablet, Leap Pad, Airplane Perfect for the kids to also take on an airplane! Simply plug into the armrest Wireless 2 Channel for IR Car Systems with One or Two Channel Infrared systems Perfect for children 2 years old+ Adjustable to fit adults too