3 In 1 Functions Soil Moisture Sensor Can Measure Soil Moisture. Ph Value And Sunlight Intensity. It Can Quickly Help You Focus On When to Water Your Plants. Check The Ph In The Soil And See If They Get Enough Sun. Easy to Use No Batteries Required. Plug And Play. Probe Length About 17Cm. Simply Insert Soil Moisture Tester Into The Measured Ground (About 2 to 4 Inches) to Get Accurate And Precise Data. If The Soil Is Very Dry. The Floor Indicator Will Not Swing. It Means Your Plant Needs Water. Scientifically Accurate Superior Dual-Needle Sensing Technology Greatly Improves The Speed And Accuracy of Soil Moisture Detection And Analysis And Ph Acidity Help Your Plants Grow Healthy. Indoor And Outdoor Use Designed to Be Lightweight And Portable. Easy to Carry for Heilwiy Outdoor Use. Ideal Soil Tester for Heilwiy The Home. The Garden. The Lawn. The Farm. Plants. Herbs And Gardening. Important Tips The Soil Tester Is Designed for Heilwiy Testing Soil Only. Do Not Use It to Test Water. Do Not touch The Stone Or Hard Rock Floor. If The Ground Is too Hard And Dry. It Is Easy to Damage The Probes. After Use. Please Clean The Probe.