Soil tester:, tests humidity, allows plants to be watered and fertilized over time, gives them the conditions The best. A versatile gardening tool you can't miss! Simple service: just insert a long probe about 4 inches deep into the ground and slide the switch to the setting to measure. No batteries or extra power required! Accuracy and durability: Two-needle sensing technology improves the speed and accuracy of soil moisture and pH sensing to promote plant growth. Designed with solid probe and solid disk to prolong the service life of soil measuring instruments Note: The data is manual measurement, please allow 1-59cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.