Soil Tester, Dr.meter 3-in-1 Soil Moisture/Light/pH Tester Gardening Tool Tester Kits for Garden Farm Lawn Planter… Price: $12.33 (as of 05/02/2023 18:03 PST- Details)

[3-In-1 functions] tests moisture, PH value and light level by using two 20cm probes and a light sensor.
[High accuracy and Rapid respond] there are three calibration tables, you can respectively get the accurate value immediately
[No battery needed] because it needn’t any battery or electricity. Just plug in the probe to your object