CONVENIENT TO USE: No batteries needed, just insert the sensor probe into the soil about 2-4 inch, flip the switch to test humidity, pH, sunlight as you want 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 indicator will not swing, which means your plant needs water. PORTABLE DESIGN Lightweight 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 healthy and strong. ACCURATE AND RELIABLE Premium dual needle sensing technology dramatically improves the speed and accuracy of soil moisture and pH acidity detection and analysis.Easy and accurate reading of humidity, of pH and light levels, promotes plant growth in a healthy way. PLANT MAINTENANCE ASSISTANT Test the soil moisture, pH value and sunshine level of the plant with our 3-in-1 soil meter, Make it easy to find out the condition of the plant, make sure the soil is suitable for growing plants with the right nutrients. Greatly relieves you of the trouble of taking care of plants. IMPORTANT TIPS 1, Do not use it for directly testing water and other liquids such as vinegar, juice, it is designed for testing soil 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. Technical Package dimensions 33.1 x 9.8 x 3.8 cm; 80 grams Type of material ABS