[When to water the plants] Have you always felt in the soil when to water? hygrometer keep your hands clean. Know the right time to water your garden and plants at any time. [Easy to use] There is an interface that uses ten ratios and three colors to read soil moisture. Just insert it into the ground and you can get the reading immediately! Remember to wipe the soil probe after each use. [Upgrade waterproof material design] The soil moisture sensor will not rust or oxidize. The waterproof design of 7.25 inches (about 18.3 cm) soil probes can also be used in most potted plants. No battery required. More sensitive and accurate. [How to Use] Just insert the probe tip into soil to the plant root level for several minutes, you can get the test result from the indicator pointer immediately. No Battery needed. Please wipe the soil moisture probe with a cloth after each use [Useful Tips] 1. Mineral salts, hard water and soil compaction will also affect the electrical conductivity of house plant accessories. 2. Do not use a hygrometer to test very hard soil. 3. Never use indoor plant watering equipment to test other liquids. Designed specifically for soil testing. 4. After use, wipe the moisture sensor. Whether indoor or outdoor, the plant thermometer can be easily carried. Colour:green Material:plastic Package Contents: 1 x soil moisture meter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.