i know its not neo stuff but its cool. My friend and i install these chips in the Gameboy advance to drastically increase the volume on your GBA!!! its very loud in stereo, it perfect fo when you are in the train or a noisy place, it stands out. just wondering if anyone is interested in having these installed in ther GBA give me an email at raveneffekt@aol.com for more info on it, believe me you wont want to miss out on this, we will work on a neo pocket one soon but for now its for GBA,very affordable too