The screen is difficult to see because it has large, brown spots floating on it. There are also some white spots. The exterior has scratches all over and the color has yellowed. When I turned it on for the first time in several years, the speaker sound was intermittent and the power switch was unresponsive. However, it started working normally after being on for a while. The cassette loaded and worked. All the buttons responded. I confirmed that the battery lasts for more than an hour. This is for the Game Boy SP unit and the charger. If you have any other concerns, please ask in the comments before purchasing.