DescriptionSoil Moisture Meter 3 in 1 Soil PH Tester Moisture Measuring humidity Meter Hydroponics Analyzer Gardening Detector Hygrometer Plant Flowers Garden Tool Feature: 3 IN 1 soil moisture content, PH and illuminance metering For outdoor indoor plants, gardens grass lawn Take the guess work out of your daily garden watering light and moisture. Save water, energy and keep your plants, lawn and flower in top condition. Measures moisture at root levelPrevents over and under watering Scientifically accurate. Easy to use, just insert and read. No battery required, simple and convenient to operate. Simply insert the meter into the soil, switch to the setting you want to measure and read the scale. To avoid damaging the electrode, please clean the electrode after each use. Functions: Moisture measurement, PH Levels measurement, Light Levels measurement. Suitable area: Outdoor plants, house plants, gardens, lawns, check compost moisture. Probe length: 20cm Specification: Moisture Range: 1-10 (1-3 Dry, 4-7 Nor, 8-10 Wet). Relative Light: 0-2000 lux (0-200 Low, 200-500 Low+, 500-1000 Nor, 1000-2000 Hgh). pH Range: 3.5-8 pH (3.5-6.5 Acid, 7-8 Alkaline). Color: Green Meter: 5 x 8 x 3.5cm [2 x 3.2 x 1.5] Probe length: 21cm [8] Bronze probe diameter: 4.8mm silver probe diameter: 5.1mm Distance between probes: 1.2cm Item size: 330*100*30mm Net weight: 87g How to use : Step 1: toggle switch to moisture/ pH/ light position. Step 2: Stick the probe into the soil about 2-4 inches. Step 3: Adjust the position of the probe until the pointer on the dial swing slightly. Step 4: After 10 minutes, read the moisture/pH/light level in the dial. Step 5: Remove probe from soil and wipe clean after each use.