3 in 1 Soil Meter: This Soil Meter help you know your soil clearer and care your plants more rational. Ideal Tool for Plant Tester: Compact and portable design for indoor/outdoor use. Functions: Measure soil MOISTURE, PH and LIGHT levels Easy to use: No Battery needed, Plug and read.Specifications: pH Range: 3.5-8 Ph (3.5-6.5 ACID, 7 NOR, 7-8 ALKALI) Moisture Range: 1-10 (1-3 DRY, 4-7 NOR, 8-10 WET) Relative Light: 0-2000 lux (0-200 LOW, 200-500LOW+, 500-1000 NOR 1000-2000 HIGH) Size: 6 x 28 x 5cm [2.36 x 11 x 2\"] Probe length: 18cm [7.1\"] Copper probe diameter: 4.8mm Alu probe diameter: 5.1mm Distance between probes: 1.2cm Color: Green Package Included: 1 x 3 in 1 Soil Tester with instruction guide Package weight: 107g Instructions: Step 1: Switch moisture/pH/light position(If meter the pH value, you need to water the plant firstly. PH indicator cannot work in dry soil) Step 2: Stick the probe into the soil about 2-4 inches Step 3: Adjust the position of the probe until the pointer on the dial swing slightly .Step 4: After 10 minutes, Note moisture/pH/light level in the dial .Step 5: Remove probe from soil and wipe clean after each use 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.Copper and Aluminum itself does not belong to the hard material, so if the soil is too dry and hard to insert, you can use auxiliary agricultural tools drill hole and then insert. 2. Design for testing soil ONLY.Cannot be used to test pure water or other liquid, electrolytic response index will be affected, can only be used to measure the soil. 3. Don\'t be inserted in the soil for a long time while using. Use cloth wipe the probe so that keep clean and dry and then use. 4. Don\'t touch fire and stay away from children.