12 volt. A wide diameter motor with a powder coated shell. Efficient and quiet operation. Integrated, sealed pressure switch for on-demand operation. Can run dry without damage. Self-priming allows for installation versatility. Vibration dampening mounting feet. Shut-off pressure 40 PSI (2.8 bar). Includes: (2) 1/2″ straight hose barbs and inline quick connect strainer. 4 GPM.