The ARB CKSA12 mini air compressor is the perfect solution for actuating ARB Air Lockers. The ARB CKSA12 air compressor kit comes with everything you need to activate 1 or 2 lockers, and totally simplifies it. It comes with complete harness that easily plugs into the other ARB components, a specific switch labeled Compressor, a pressure regulator switch to protect your locker, and detailed instalation instructions. The ARB-CKSA12 only requires 3 wires to hook up, a power and 2 grounds. One Ground close to the compressor for the motor, and one for the switch lights, since ARB did all the hard work biulding the wiring harness, the least we can do is hook this ground to the dash lights dimmer ground. This way when you dim your dash lights, your ARB lights dim with them. (Tech note: Most newer vehicles have a light ring around the cigarette lighter, this is the perfect ground to tap into, and it is usually close to where you are mounting the switches) This completes the professional factory effect of the install. We love installing ARB lockers and CKSA12 or CKMA12 (high output) air compressor kits for customers b/c the end result is so nice and clean that customers think we are geniuses. If only they knew how easy ARB made it.