OOTDTY Features: 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 time 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) Specifications: Material: ABS IMeasuring range: 0-99999L-99999G 0.8-8.0LPM (liters/minute)/0.2-2.1GPM (gallons/minute) Resolution: 1L/G; 0.1LPM/GPM Accuracy: ±10% Connection port: 1/4″(Φ6mm) Battery: 2 x 1.5V Batteries(not included) Size: app.66x90x63mm/2.60x3.54x2.48in Color: White Quantity: 1pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Water Flow Meter(other accessories demo in the picture is not included.)