Battery-Powered Electric Fuel Pump: Powered by 4 AA batteries (batteries not included), this fuel transfer pump battery powered unit has a maximum flow rate of 3.2 GPM, transferring approximately 100 gallons per battery set. In an emergency, it can run on 2 AA batteries at 1.2 GPM, transferring about 50 gallons—works as a battery operated gas can pump when needed. Automatic Stop Sensor: The pump automatically stops when the fuel tank is full, preventing overflow—ideal as a gas pump for gas can use. It works with gasoline, diesel, and non-potable water, transferring up to 3.2 gallons per minute. A locking clip keeps the nozzle in place, so you don't have to hold it while it works. Note: The output nozzle must not touch the fuel, or the pump will stop automatically. Easy On/Off Control: To start, just screw the siphon onto the can and press the "On" button. To transfer liquid, attach the suction pipe to the supply container, place the drain spout in the receiving container, and press “On” for fast, easy flow. To stop, simply press "Off". Works as a battery gas pump for gas can for quick transfers. Wide Compatibility: The hose is made of durable polyethylene plastic and comes with 3 universal adapters (2 inch, 2.1 inch, 2.75 inch), fitting most cans. This portable fuel pump works with gasoline, diesel, non-potable water, antifreeze, windshield washer fluid, and more. Please check compatibility with your can before purchasing. Portable Design: Built for long-lasting performance, this gas can pump is perfect for quick, clean, and reliable liquid transfers. Keep it in your trunk, garage, or toolkit for use with cars, motorcycles, boats, lawnmowers, snowblowers, and more. Helpful Reminders: Cans and batteries are not included. Before use, always submerge the pump's intake in liquid before turning it on. Never run the pump without liquid. Clean the sensor regularly to ensure proper operation. For best results with this gas transfer pump battery operated unit, keep the sensor free of residue. Fuel Transfer Pump with Auto-stop Sensor