3-in-1 Functions: Easily monitor soil conditions. This tool enhances gardening and planting. Easy to Use: The soil tester uses electrodes and requires no batteries or other power source. Simply insert the meter into the soil and wait a few seconds for the data to appear. Accurate and Reliable: Double-needle detection technology enhances the speed and accuracy of soil moisture, pH, and light detection. Multi-Application: Suitable for gardens, courtyards, lawns, greenhouses, plantations, and both indoor and outdoor potted plants. Instructions: Step 1: Push the switch to the moisture/pH/light position. Step 2: Insert the probes into the soil 4-6 inches (2/3 of the probes). Step 3: Adjust the position of the probes until the pointer on the dial moves slightly. Step 4: After 10 minutes, read the data. Step 5: Remove the probes from the soil and wipe them clean after each use. Color: Blue Material: Plastic Package Contents: 1 * Plant Hygrometer Warm Tips: 1. This soil tester is only for use in soil. Do not use it to test liquids such as water, lemon juice, or vinegar. 2. To avoid damaging the probe, do not insert it into very hard soil or against hard objects. 3. For accurate sunlight readings, point the light sensor at the top front of the dial towards the sun. 4. Do not leave the probe in the soil for an extended period. Remove and clean it after use. Only the items listed above are included. Note: The color of the item in the picture may appear slightly different from the actual item due to lighting and display variations. The measurement error is +/- 1-3cm.