CONVENIENT TO USE: No batteries needed, just insert the sensor probe into the soil about 2-4 inches, toggle switch to test the moisture, pH, sunlight you want to measure , then wait a few minutes until the pointer stops swinging to get a stable reading on the scale dial. If the plant is very dry, the soil pointer will not swing, it means your plant needs water. Accuracy of soil moisture and pH acidity detection and analysis, can easily and accurately read moisture, pH and light levels, promote plant growth so healthy. PORTABLE DESIGNLightweight and portable design, ideal tool for testing soil conditions (moisture/light/pH) of fruits, flowers, vegetables, shrubs, etc. Ideal tool for indoor/outdoor plants, help your plants grow healthy and strong. PLANT CARE ASSISTANTTest soil moisture, PH value and sunshine level of plant With our 3 in 1 function soil meter, let you know the condition of the plant easily, make sure the soil supports plant growth with proper nutrients. Greatly relieves you from the trouble of caring for plants. IMPORTANT TIPS 1, do not use it to directly test water and other liquids such as vinegar, juice, it is designed for testing the ground only. 2, Avoid stones or hard rocks when inserting the probe into the ground, if the ground is too hard, the probe may be damaged. 3. After use, please clean the probe. Do not leave the soil tester in the soil for more than an hour.