The main components of this kit are:

TMR-IF33 wireless transmitter

IFR-33 wireless receiver

9V DC output AC adapter

Set of headphones

I'm not sure if this product was sold in North America, this one was purchased in Japan. In the second photo you can see the original packaging.

I do know that Sony used the same IR transmission system in some of its North American TVs - these components work with the wireless headphones that came with my old XBR TV.