infrared, Can't work for Bluetoo Headphones. Not a universal，if your unit does not support headphones please do not buy Only for cars with Ceiling DVD Display and Rear Seat Entertainment if your vehicle's original headset is Bluetoo, Our Infrard headphone is not compatible Ensure the Channel/screen selector switch is in the same position as the headphone selector switch Coming without battery and manual IR Replacement headphone
Actual product Pls refer to our pictures
No battery and instructions included
if your unit does not support headphones please do not buy