The Liquidynamics Battery Operated 0.26 to 8 GPM Digital Meter with Flex Spout 1/4 in. Auto Tip has a non preset oil control handle with flex hose, automatic tip and electronic digital meter for measuring fluids such as engine oil, gear oil, transmission fluid, and 100% antifreeze (ethylene glycol). The fuel transfer pump has meters that are powered by 2 field replaceable AAA alkaline batteries, with a minimum one year life expectancy. This battery powered fuel transfer pump as an accuracy of +/- 0.5% over a flow range of 0.26 to 8 GPM and maximum operating pressure of 1,000 PSI. The inlet measures 1/2 in. NPTF swivel. The units of measure are shown on the LCD display and easily changed from quarts to pints, gallons and liters. The cumulative total indicates gallons (or liters).