Product description: pH range: 3 ~ 8 pH Humidity: 1~8 pH Accuracy: 0.3 Resolution: 0.2ph Operating temperature: 5~50C (41~122f) Size: 160*50mm Weight: about 139g / 4.9oz Package List: 1 x Soil pH Meter < p>1 x English manual Very suitable for vineyards, orchards, field production, care growers, lawn care, gardens, quick reference of pH and humidity of the plantation Waterproof and reliable metal electrode. Long-term trouble-free durability Quickly and accurately measure pH and moisture levels. Testing soil moisture, pH and sunshine of plant with our MS02 indicator, quickly helps you to grasp the right time to water your plant, check the pH value in the soil and know whether the sunlight is enough . Trouble-free long-term durability Features: Very suitable for vineyards, orchards, field production, care growers, lawn care, gardens, planting quick pH and moisture references Reliable waterproof metal electrode Measure pH and moisture quickly and accurately< /p> Long trouble-free life, no battery required Note: 1. The metal probe of the instrument should not be inserted into the soil for too long to avoid oxidation damage and damage to the surface of the probe. After the measurement, the soil particles on the surface of the metal probe should be wiped off with a scouring pad every hour. 2. Confirm that the metal probe should be cleaned and kept dry before storing the instrument. 3. Keep the probe away from other metallic substances; 4. When the instrument is inserted into the ground: Be sure to press the ground clockwise to measure, so that the ground is in close contact with the metal probe. Remember not to turn the instrument from side to side and insert it into the ground, otherwise the metal probe will come off easily, the connecting wire will be broken and damaged, making measurement impossible.< /p> 5. The instrument is only used to measure wet soil. Too high or too low humidity has a significant impact on the accuracy of pH measurement.