This is the "LIGHT BOY" accessory for the Nintendo Game Boy. It magnifies the screen and illuminates it with a light, improving visibility in dark places. I believe it's unused, but it doesn't turn on even with batteries, so I'm selling it as junk. There's a rattling sound inside, possibly from a screw. ・Everything in the photos is included. ・Please purchase only if you understand that this is a retro item. ・No further discounts are possible.