lil luke mate X4s are exactly the same as the X41s mate. they are a wireless surround sound headset the only diference is that you need the reciever to be powered by a plug instead of USB power supply that the X41s have. The headset appearance has a massive change too if you are interested in buying some X4s here is an Ebay link for ya kidda http://cgi.ebay.co.uk/Turtle-beach-x4-/150499695200?pt=LH_DefaultDomain_3&hash=item230a7b1a60#ht_500wt_1154