Each chip is fully working and OEM in great condition. They are used, since they were pulled from DS Lites, but they work 100%.
There are two different structures - check photos and you will see. However, they work 100% the same and are both fully authentic Nintendo.
I have flashed/modded some of these with Flashme, which removes the DS startup animation and the Warning screen - it makes it start right up to the DSL's home menu.
You can purchase one with a random number, or one with 69.
