HCDZ Replacement IR Headphones 2 Channel for Subaru Tribeca 2006-2014 Forester Crosstrek Outback Ascent Rear Seat Headrest DVD Entertainment System

What’s in the package: 1 X headphone , no battery and instructions included
it will work straight away when new batteries inserted
¡ñDo not leave the headphone in an extremely hot or humid place.
¡ñDo not use a new battery with an old one.
¡ñIf you don’t use the headphone for an extended period of time, remove the batteries to avoid possible damage from battery leakage and corrosion.
The item can not work with a car if its original one is a bluetooth headphone
No batteries and instructions included
No programming needed
Easy to Use, Just put in fresh batteries , then it will work .