Control panel with modular design, fully functional, simple structure, convenient operation. Can be widely used in petroleum, chemical, pharmaceutical, portation, food to be industrial and commercial. Setting units of measurement: In the standby mode, or raise the amount of current display state Press CAL + RESET button for 5 seconds Enter unit conversion settings, press the RESET button Followed by LTR GAL PT QT LTR choose the unit of measurement, While the cumulative filling volume displayed in the current unit of measure conversion after Press the MENU key for 3 seconds to exit the unit conversion settings. Note: This product requires 2 AAA batteries, more convenient for you to use, this product comes with 2 AAA battery replaceable battery Low Battery Tips When the battery voltage is 2.2V to 2.4V, display LBat, to remind the user to replace the battery. Color: Blue & White Material: plastic Specifications: Model: K24 Media: methanol diesel fuel kerosene chemical liquid urea water Importers: 1 inch internal thread Measurement accuracy: 1% Repeatability: 0.5% Maximum working pressure: 5BAR Operating voltage: 2.3-3.3V Flow range: 10-90L / MIN Single count: 0.00-9999.9 The total cumulative number: 0.00-999999.9 Unit: L / L, gal / GAL, pint / PTS, quart / QTS Single measurement cleared: RESET Package Contents: 1 x K24 Turbine Digital Diesel Fuel Flow Meter 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.