Rack Hog 4 Control Unit, B-Stock units with 90 Day Warranty. Contact your GearSource Sales Representative for more details. A Hog in a box! RackHog 4 has all the power of a Hog 4 console condensed into a 3U rack mount unit making it the ideal solution for fixed install applications such as cruise ships, theme parks, and architectural installations. RackHog 4 is also perfectly suited to operate as a backup to any Hog 4 family console.