The Naki
Memory Rocker Pak can be used to save your game, as well as acting as a
Rumble Pack, providing force feedback. The Rumble Pack doesn?t need batteries, which is always a plus, but it doesn?t feel as good as some other rumble packs. The rumble feature is not very powerful, and makes more of a ?buzz? than a rumble.
Just pop it in the port on the controller, and you?re good to go. Since this pack has both Memory and Rumble features combined in one pack, it will also lessen the amount of physical wear caused by inserting and removing packs from your controller over and over.