The PCB finish is ENIG.
A simple DS Lite rumble cart that fits into a DS Lite GBA dust cover which works with DS Lite rumble games such as Metroid Prime Pinball, Metroid Prime Hunters, Clubhouse Games, etc. The rumble strength is slightly adjustable using the trimpot on the board. Designed and made in Australia.
If you use this on an Analogue Pocket, some users have found you need to not insert it all the way as sometimes it doesn’t make proper contact.