The Automatic Float Switch converts any bilge pump that draws up to 12A (at 12V) or 6A (at 24V) to fully automatic operation. It features a compact, low-profile design that mounts on any surface from horizontal up to a 24 angle.No large voltage drop which reduces bilge pump output like some reed switch designs.Incorporates a reliable and affordable mechanical switch that actuates pump motor at 2″ water level. Wire leads do not flex or hinge with the float as on some competitive models.Sealed switch mechanism resists moisture, fume ignition and electrical shock. Contains no harmful mercury.Float switch installs independently or directly onto the rear slots of the V-Series pump bracket. Features a convenient test knob to test pump operation. Actuates pump motor at 2″ water level Maximum pump amperage is 12 Amps Dimensions: 3″ high x 3-1/4″ wide x 4-3/4″ long Rated voltage: 12 and 24 volt