This is a junk item, a first-generation Game Boy handheld game console made by Nintendo. The board is marked DMG-CPU-04 when viewed from the battery compartment side. It is a non-returnable junk item due to the following issues. The main unit works, and the contrast adjustment and buttons function without problems for gameplay. However, the volume cannot be adjusted (sound is produced), the screen has scratches, and there are many instances of yellowing and scuffs. Additionally, operation with earphones, communication cables, and an AC adapter has not been confirmed. Please message if you have any other concerns. Software is not included.