The Brawler64 Wireless Edition still has the same great shape and ergonomic design you know and love. Aside from the technological advancements, we’ve made some subtle changes to improve your gameplay. After much feedback from the retro gaming community, we’ve upgraded the feel of “Z” triggers to have a more “digital” press versus an “analog” pull. The Brawler64 is compatible with 1st party and most 3rd party memory paks. Due to the wireless technology, the memory paks are loaded into the included wireless dongle and are not inserted into the controller itself. For the same reason, rumble and transfer paks are not compatible with the Brawler64 Wireless Edition.