According to their website you still need the box to use it. The gun plugs into the box and the box has the correct connections for TV or VGA depending on which box you buy. The box is the expensive part of that whole package.
That gun is on clearance right now for $10 from the manufacturer as a clearance item because it is no longer being made. Probably has to do with the making toy guns look like real guns law of something to that affect.
Encryptor