Water purifier water flow meter, convenient and intuitive test flow and flow rate, simple and convenient installation, and can set the flow alarm sound prompt. Can be connected to filter equipment such as water purifier to detect its use or filter replacement cycle. Features power saving function, it will automatically enters the off mode after 5 minutes of opening. (The measurement is not affected) IMeasuring range:0-99999L/0-99999G 0.8-8.0LPM (liters/minute)/0.2-2.1GPM (gallons/minute) Resolution:1L/G;0.1LPM/GPM Accuracy:10% Connection port:1/4inch(6mm) Battery:2 x 1.5V Batteries(not included) Colour:White Material:Plastic Size:app.66x90x63mm/2.60x3.54x2.48in Package Contents: 1 * Monitor Filter Water Flow Meter(other accessories demo in the picture is not included.) 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.