The CALIFORNIA AIR TOOLS SP-9413 Ultra Quiet and Oil-Free Air Compressor Pump/Motor is designed to be one of the quietest in the industry having only 60 decibels of sound. The new SP Series of Ultra Quiet Air Compressor Motors have been designed to increase duty cycle and allow for longer continuous run times. These motors are engineered to dissipate the heat better which allows for a cooler operation reducing wear and increasing life before service. The powerful 1HP motor operates at only 1680 RPM creating less noise and less wear. The Oil-Free Dual Piston Pump System is engineered for high performance and durability. California Air Tools Portable 120 Psi Horizontal Quiet Air Compressor | SP-9413