CONVENIENT TO USE: No battery needed, just insert the sensor probe into the soil about 2-4 inches, toggle the 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 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 and strong. ACCURATE AND RELIABLE Premium double needle sensing technology greatly improves the speed and accuracy of detecting and analyzing soil moisture and pH acidity. Easy and accurate reading of moisture, pH and light levels, promotes plant growth in a healthy way. PLANT CARE ASSISTANT Test the soil moisture, pH value and sunlight level of the plant with our 3-in-1 soil meter, Make it easy to know the condition of the plant, ensure the soil promotes plant growth with proper nutrients. Greatly relieves you from the trouble of taking care of plants. IMPORTANT TIPS 1, Do not use it to directly test 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 soil, if the soil 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 1 hour.