The TRAC Outdoors Portable Bilge Pump helps remove excess water from the bottom of Jon boats, utility boats, dinghies, inflatable boats, and other small watercraft. This pump operates using (3) D-cell batteries (not included), allowing it to serve as a back-up bilge pump during emergencies. It can also remove fluids in many non-marine applications. This product has a 250 GPH flow rate at zero head. The bilge pump runs dry without damage and can be completely submersed. Product measures 5-inches x 5-inches x 12-inches and includes a ¾-inch x 36-inch hose that easily reaches from the bottom of your boat to discharge water with ease. Mounts using the provided suction cups or mounting screws.