What he said. The lockers don't 'normally' come with a compressor, you add that on. (though most of the time there are 'specials' that include a compressor) So you can get this one...

CKSA12 - This compact vehicle mounted Air Locker Air Activation System has been specifically designed to provide on-board air for activating ARB Air Locker locking differentials. A smaller unit, it comes with a mounting bracket that allows versatile positioning and is sealed for moisture and dust resistance with quality components used for reliable compressed air and extra long life.



or

CKMA12 - Permanently mounted, this compressor is installed into your truck and includes a full wiring loom with Air Locker solenoid plug in contacts, mounting hardware with reinforcing bracket and quality compressor isolating switch. This compressor can be used to activate Air Lockers, and can perform other functions such as inflating camping gear with an optional inflation kit sold separately.



or if you don't have a locker and don't want to mount a compressor you can get this guy..

CKMP12 - This portable 12V air compressor comes in a durable polypropylene carry case for added versatility and uses quality components for quiet operation and extra long life. Including a 19ft air hose, it also comes with all the necessary fittings for tire inflation and camping or leisure gear.




And that's our ARB Compressor lesson for today

 

My first was the larger one they had offered at the time, having front and rear lockers and knowing I would be abusing the poor little compressor, I got the bigger model first.... I also made a small 1/2 gallon tank with about 4 feet of hose on it so the damn thing didn't cycle all the time, its been used to air up the 35" tires a few times.... They've been installed in the Jeep for 8 years now, no regrets...