This brick style AC power adapter is made to power both the new Mantis cases and uZeus/Happy Ending Kits. When powering a uZeus, it will double the capacity of the uZeus +12V rail up to 2000mA.
This is especially great for systems with digital modules that consume most of their current from the +12V rail. It is rated at 3000mA and is made with heavy gauge wire for better grounding and a specifically set output voltage that helps keep the uZeus cooler. It is a good option for users maxing out the standard adapter shipped with the Happy Ending Kit.
All you need to add is a standard IEC Power Cable (also know as a "kettle" lead) for whatever country you are in.