I purchased this product because my PX21 headset would not work properly with my XBOX. The first problem I had was I could not use HDMI and the headsets big connector. Then when I finally got both of those connected the picture would only come through in 1080i. The only solution was to ditch the component cables and buy this device. Now I just connect it to the XBOX, and plug the audio cords into this, and the HDMI into the Xbox. Since buying this device, now I can listen to the XBOX either through the headset (games) or through the tv (movies). It really has made it much easier owning the Turtle Beach headset (which I do not recommend for the Xbox anyways). If you have any problems pairing the Xbox with the PX21's, this is the way to fix it.