Appreciate your response, going to order and give these a Try!! ThanksThe ones in my 2012 RRS use infra-red. I believe the protocol is called Whitefire (kinda like bluetooth but for IR?) meaning you can't just use any old IR headphones.
It looks like they may have changed to wireless for the 2013 and later model.
I found this: https://www.ebay.com/itm/2-Wireless-DVD-Headphones-for-Land-Rover-Vehicles-New-Headsets-/251986043364