Intelligent data display: 1 inch flowmeter can display instantaneous flow and cumulative flow with intelligent counter, the reading display is accurate and intuitive clear. More unit selection: flow meter default is gallon unit, optional measurement units: L, Gal, , standby up to one year. High precision measurement: with high precision counter, measurement accuracy ??1%, high reliability, good repeatability, maximum working pressure: 6RAR, cumulative technical range: 999999. Wide range of application: turbine flowmeter can be used to measure water, gasoline, , methanol and other low , non-viscous liquids. Warm tip: Please check the battery electrode of the flowmeter once a year, so as not to affect the battery leakage resulting in water flowmeter damage. Colour: As Shown Material: Metal Size: 105 x 66mm Package Contents: 4 x 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.