&149; Variable Speed Control &149; Solid State Pressure Sensor &149; Nearly Silent Operation / No Cycling &149; Operates on 12V DC or 24V DC &149; Controls Pressure by Changing Motor Speed &149; Speeds Up As Demand Increases &149; Selfpriming / Runs Dry &149; No Accumulator Tank Needed &149; CSA Listed / EN ISO 8846 Marine / C.E. Certified &149; Patent Pending