Four digit LCD readout for 3 to 30 GPM (10 to 100 LPM). Factory calibrated for fuel in US gallons. 1" NPT, 300 PSIG. (Two self-contained, field replaceable AAA batteries.) Batch and cumulative totals. Manual ON and automatic OFF. Accuracy up to +/- 5%. Operating temperature range 14-130° F. Two year warranty.