Clear Nintendo GameBoy Advance model number AGB-001 requires 2 AA batters. Missing the original cover for the battery compartment, because it has a rechargeable battery pack. Still works, see video. The game is a black and white GameBoy original game, but plays on this device just fine. This is literally the most fun game ever. It’s so underrated and I love it so much. I do not have a working charger for the battery pack. The game is currently selling for $25.