The oversized back-lit display can be easily read in any conditions. Displays fuel flow in gallons (5-34) or liters (2.5-160) per hour. Also displays total or trip fuel used, calculates fuel remaining, and includes a selectable low fuel alarm. The fuel flow transducer installs in a 3/8" flexible fuel line. Logs are saved in memory at power down. For gasoline only. Fits a standard 2-1/16" gauge mounting hole. 8-16.5 VDC.