About this item It is lightweight and portable design, convenient for indoor and outdoor use. Easy to use: This 3 in 1 moisture meter with function ph and light tester does not need batteries, you can use it indoors or outdoors. Insert the probe into the soil around 2-4 inches, then flip the switch to test what you want to measure. p> Reading accuracy: Humidity range: 1-10 (1-3 sec, 4-7 nor, 8-10 wet), relative light: 0-2000lux (0-200 low, 200-500 low +, 500-1000 north, 1000-2000 high), pH range: 3.5-8 h (3.5-6.5 acidic, 7-8 alkaline). Extremely convenient and easy to use No batteries or preparation required; you simply plug our soil tester into the area of soil you wish to check and instantly get an accurate reading. Can measure soil moisture PH degree the intensity of sunlight required for plant photosynthesis. Speci fication Material: plastic Size: 26 x 6 x 3.5 cm (10.24 x 2.36 x 1.38 inch) Probe Length: 17.5cm / 6.89inch (Approx.) How to use: Step 1: Toggle switch to moisture/pH/light position. Step 2: Stick probe into soil about 2-4 inches. Step 3: Adjust the position of the probe until the pointer on the dial swings slightly. Step 4: After 10 minutes, read the moisture/pH/light level in the dial. Step 5: Remove the probe from the soil and wipe it clean after each use. Package Included: 1 x Humidity Sensor