Very good water meter that easily attaches to the bare hose with a quick connector or similar fitting that we use for the faucet and shuts off when inactive after 2 minutes. The battery is one of the round ones and I have no problem. It also has 2 buttons and resets the measurement and from the memory so far it's good since I am in an area with high humidity and I have it outside. On the display, there are 2 indicators; the first one at the top shows how many liters of water are coming out per minute and below it shows the total in liters that you have consumed. Of course, when the water is running, the consumption goes up a lot, but when you turn off the water, it will show you the water consumption you made and will continue to measure when you water the next time you water. So if you water every 2 days with an average watering time, you calculate the water for 1 month at half, 15 days (when you water every 2 days) with the total amount of water you consumed and with the total, you get the cubic meters of water with the meter on your phone (the app) for the month.

It is a flow meter, not a programmer. Its purpose is to measure how many liters pass through a pipe.