[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 levels. 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 improved sensitivity and accuracy. [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 readings. 2. Do not use the hygrometer in very hard soil. 3. Never use the device to test liquids other than soil. Designed specifically for soil 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 in the color shown in images compared to the actual item. Measurement error allowance is +/- 1-3 cm.