[When to Water the Plants] Have you always checked soil moisture by feeling in the soil? A hygrometer keeps your hands clean and helps determine the right time to water your garden and plants at any time. [Easy to Use] Features a scale with ten ratios and three color indicators for easy reading of soil moisture. Simply insert the probe into the ground to get an immediate reading. Remember to wipe the soil probe after each use. [Upgrade Waterproof Material Design] The soil moisture sensor resists rust and oxidation. With a 7.25-inch (approximately 18.3 cm) waterproof probe, it is suitable for most potted plants. No battery required. Offers more sensitive and accurate results. [How to Use] Insert the probe tip into the soil down to the plant root level for several minutes. Read the result instantly from the indicator pointer. No battery needed. Wipe the soil moisture probe with a cloth after each use. [Useful Tips] 1. Mineral salts, hard water, and soil compaction can affect electrical conductivity in soil testing. 2. Do not use the hygrometer in very hard soil. 3. Never use this device to test liquids other than soil. Designed specifically for soil moisture testing. 4. Always wipe the moisture sensor after use. Suitable for both indoor and outdoor plants. Color: Green Material: Plastic Package Contents: 1 x Soil Moisture Meter Note: Light and display differences may cause slight variations between the item color in the image and the actual product. Measurement error allowance is +/- 1-3 cm.