7 in 1 Soil Tester pH Moisture Light Fertility | Yieryi lawn irrigation system Yes—it runs on 3 AAA

Yes—it runs on 3 AAA batteries (not included)

They are great for spotting when a nutrient is running low and for tracking whether feeding worked

Can I put it in water

and we are honest about which readings are measured and which are a directional guide

7 in 1 Soil Tester pH Moisture Light Fertility | Yieryi lawn irrigation system Yes—it runs on 3 AAAThis 7 in 1 soil tester reads soil pH, moisture, fertility, and temperature, plus light, air temperature, and humiditya rounded read on both your soil and the environment around your plants, all on one backlit screen. Push it into moist soil and check the values. The pH and moisture are measured directly. Read pH as a direction, aiming for 6. 0 to 7. 0 for most plants. The fertility figure is a directional gauge of overall nutrient level, useful for