Ultra-Compact High Volume Air Source: Made to take the tough demands of 4 wheel drive vehicles, Fits where other high-flow units can't, Works With ARB's Air Locker Differential Lock: Pneumatic supply & electric control for ARB Air Locker(s), Requires ARB Pump-Up Kit (part #171302) for Air Locker use, Fast, Quiet & Powerful: Enough output to air up 4 35"-27" tires in a single duty cycle, Typically airs up a 35" tire in just over 2 minutes, Ball-bearing equipped motor is quiet enough to mount in the cab, Produces 2.3 CFM at 29 PSI, Complete Wiring Harness: Includes Air Locker solenoid plug-in contacts, Splash-Resistant Washable Air Filter: High-flow sintered bronze filter cartridge stands up to hard use, Anodized Mounting Bracket: Dissipates motor heat; compressor can be repositioned 180°, Handy & Versatile: Inflate car, truck, SUV, motorcycle, ATV tires, rafts, toys, etc., ARB Part #171302 Pump Up Kit needed,