Silver Game Boy Advance Micro, the main unit used when selling the cartridges. I used it without any problems, so I think it's fine. Please note that the cartridges are not included. Also, consider the earphones and power cord as extras. I will use recycled cardboard for shipping. I pack it a bit excessively to prevent dents. Thank you for your understanding. Please feel free to comment with reasonable price negotiations. Thank you for looking.