Heaphones for factory entertainment

[06xl]

I'm looking to purchase 4 headphones for stock entertainment setup I've searched eBay an found several brands etc etc but my question is what does the headphone need to be equipped with to be able to work with GMC's factory DVD player??? Is there any special frequency?? Thanks in advance

 

[riso79]

Infrared headphones is all you need to worry about.

 

[06xl]

As long as they say infrared I can buy them??