Usage Tips:Multi Function Display: the flow meter adopts a high definition LCD display, and the screen displays the clear key and setting query key, instantaneous flow rate, cumulative flow rate, and unit, the readings are clear and at a glance, allowing you to understand the water flow in time for control, Its measurement accuracy is 1% and repeatability is 0.5 Reliable Quality: the water flow meter gpm is made of quality aluminum alloy materials, it is made of quality and high craftsmanship, it has a compact structure, is not easy to rust, and is strong and reliable, the whole machine is also upgraded and optimized, fully sealed, and has excellent waterproof performance, it can work normally underwater and has a longer service life Five Measurement Units: our LCD digital display flowmeter has five measurement units, namely , , GAL, Liter, and meter, the default measurement unit of the flow meter is Liter, If you want to change the unit, first, you have to hold down the "C" key and the "R" key for more than 5 seconds; Then, press the "R" key to select, After confirming, press C key for 3 seconds to save and exit Wide Application: our high accuracy digital hose water meter is well made and has the characteristics of complete functions, simple structure, and easy use, its flow range is 10-100L/Min, and its maximum working pressure is 20BAR, it is widely utilized in , gasoline, water, , and chemical liquids Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Blue Material:Aluminum alloy Size:1inch Package Contents: 2 * Turbine 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.