Convenience: and compact size provides convenient operation and update installation. Modular design: Make crude oil fuel flow meter suitable for output module, sensor and remote control transmitter. Digital LCD display: High-definition display uses NPT counter to display instant and cumulative flow. Clear reading and accuracy measurement: intuitive and clear reading, high reliability, measurement accuracy +/- 1%. Application: Pump flow meter, which can be widely used to measure water, crude oil, , gasoline, etc. Operating voltage: 2.3-3.3V Battery Type: 2 * AAA battery (included) Thread Size: 1inch NPT Repeated +/- 0.5% Accuracy: +/- 1% Maximum working pressure: 20BAR Flow range: 15-120 liters / min Number of single: 0.00-9999.9 Total accumulated count: 0-99999 Error number: 0.1000-9.9999 Unit of measurement: L / GAL / / Operating temperature: -10 ?? C ~ +60 ?? C (-22?? F~ + 140??F) Colour: red Material: stainless steel, aluminum alloy Package Contents: 4 * Digital Fuel Flow Meter (with battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.