Atree Soil Moisture Meter, Plant Moisture Meter, Plant Water Meter for House Plants, Soil Test Kit Hygrometer Moisture… Price: $17.73 (as of 05/02/2023 17:54 PST- Details)

SOIL MOISTURE METER: This soil moisture meter is only for testing soil moisture level, make your plants can grow healthy and strong(DO NOT test pure water directly)
EASY TO USE: 7.6″ probe length, simply insert the plant moisture meter into the soil 4-6 inches(2/3 of the probe), and you’ll get your reading
NO BATTERY NEEDED: No batteries or electricity needed, plug and read