The California Air Tools Ultra Quiet and Oil-Free Air Compressor is designed to be one of the quietest air compressors in the industry, operating at only 60 dB of sound. The powerful 1.0 HP (SP-9413) motor runs at just 1680 RPM, creating less noise and less wear. The SP series of Ultra Quiet Air Compressor Motors has been designed to increase duty cycle and allow for longer continuous run times. The oil-free dual piston pump system is engineered for high performance and durability, while the 5.5-gallon steel air tank is lightweight (50 lbs.) and the wheel kit makes it very easy to transport. This air compressor is ideal for anyone working inside where noise is a major issue.