P/N 10002 Quarter Duty Cycle Onboard Air System is a smaller, 120 psi onboard air system, suitable for many pneumatic needs, including smaller inflation tasks (not including the inflation of automotive tires), air horns and more. The 25% Duty Cycle Onboard Air System will provide enough service time to operate for about 10 minutes of continued use, providing you give the system 30 minutes to cool down afterwards. Onboard Air Systems (OBA) are complete pneumatic systems intended to accomplish various tasks, depending on the kit selected. VIAIR offers OBA systems for smaller compressed air requirements that have a shorter duty cycle need, as well as other systems that provide up to 100% duty cycle and increased air volume by providing a larger tank for compressed air storage. Each Onboard Air System comes complete with compressor(s), air tank, fittings, pressure switch, relay(s), electrical connectors and all applicable accessories.