THZY Soil Moisture Meter,Hygrometer Moisture Sensor soil Indoor/Outdoor Moisture Sensor Meter, soil water monitor, for gardening, farming (No Battery needed) SIMPLE& EFFECTIVE-- Simply insert the probes into the soil about 3-5 inches,10 cm above the probe to be inserted, toggle switch to test moisture.the most accurate measured make your plants healthy grow INDOOR & OURDOOR USE - just need plug and read! Soil moisture meter let you know when to water. Its a necessary tool for outdoor & indoor plants, gardens, lawn, vegetables, etc. HIGHLY ACCURATE & No Battery Required- Our soil meter is a combination of precision, accuracy and durability.It's no need for batteries.Large and clear dial, including ten scales. IMPORTANT TIPs --1, Do not touch the stone or hard rock soil, if the soil is too hard and dry, easy to damage the probes. 2. Design for testing soil ONLY. 3. After using, need to clean and wipe the probes. SATISFACTION GUARANTEE - We believe in the quality of our soil test kit. If you have any problems, contact us freely and we support replacement and promise reply with 24 hours friendly customer service. We promise 12-Month Hassle Free Money Back or Free New Replacement guarantee