ONE BUTTON CONTROL WATER FLOW METER W/RATE AS-121

One-button control for easy operation. Top/bottom with quick connector. LCD display to show 1, 2, auto, rate.  Auto to show the single time water flow volume (back to Zero automatically).  Rate to show the updated water flow rate.  1, 2, for water volume accumulation, can keep the records of one day, one week, or one month.  Lit/Gal unit changeable.