XLUX T12 2 in 1 Soil pH and Moisture Sensor Meter Tester for Outdoor & Indoor Plants Gardens & Grass Lawn WARRANTY-- 18 months after the date of purchase, we take care of all quality-related issues with a REPLACEMENT or REFUND HOW TO USE -- No batteries needed, Indoor or outdoor use. Simply insert the probes into the soil about 3-4 inches, and you'll get your reading. Ideal tool for indoor/outdoor plants, help your plants grow healthy and strong. FUNCTIONs -- 1,Measures moisture content of soil to lets you know when to water 2, Helps you control pH level in soil, acidic or alkaline is suitable for your plants, You will never plant your lovely flowers into high-acid or Extreme alkaline soil 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. Never use it to test liquid. Designed for testing soil ONLY. 3. After use, please wipe clean the probe.