All functions work perfectly. All buttons respond normally. I am using a 128GB microSD card with a Memory Stick conversion adapter. The battery has been replaced with a third-party one, so the battery life is better than a PSP with the original battery. When the battery was replaced, the cover became difficult to close, but it fits normally when the battery is removed. The battery will be shipped separately. If you are concerned, I recommend replacing the battery. There is some dirt due to aging, but after cleaning with a disinfectant wipe, there was no stubborn dirt. USB charger included.