Has not been tested, looks to be in good shape.

The Game Boy Advance Wireless Adapter Accessory by Nintendo is a wireless network adapter specifically designed for the Nintendo Game Boy Advance platform. This clear plastic unit allows for wireless connectivity, making it easier to connect and play games on the Game Boy Advance console. The adapter is compatible with the Game Boy Advance model and is the perfect accessory for enhancing your gaming experience with more freedom of movement and less restrictions.