TDS meter: 3-in-1 TDS EC and Temperature Meter 3-in-1 Professional TDS Meter is very useful if you want to know how clean your water really is,and it is a professional water test meter that fits in your pocket. This Accurate and Reliable Meter perfect for all water quality testing, water purification applications, waste water regulation, aqua culture,hydroponics, laboratory and scientific testing, pools & spas, ecology testing, silver, water treatment and more. A suitable soil environment is important for the healthy growth of plants. This means providing perfect soil conditions, adequate water, sunlight and plenty of nutrients for your plants. tester helps you know your soil more clearly and care your plants better. It will help you to avoid some of the common mistakes made by such as over or under watering and planting in an area with insufficient lighting and even highlight potential issues with soil that is too alkaline or acidic. PH Meter: How to use? Step 1: Remove the protective cap : Clean the electrode in distilled water and dry it Step 3: Turn the meter on by pressing the ON/OFF key Step 4: Immerse the pH meter electrode in the solution to be tested Step 5: Stir gently and wait for the display stabilizes Step 6: After finished, clean the electrode in distilled water and turn the meter off by pressing the ON/OFF key Product Features: Measure Range : 0.00 - 14.00 pH Resolution : 0.01 pH Accuracy : 0.05 pH Calibration: Two Points Automatic Calibration Button Power Supply: 2 x 1.5V LR44 Button Batteries Weight: 50 g Degrees Celsius: 0.1-80.0 Conductivity: 0-9990us/cm TDS: 0-9990ppm Accuracy: 2% Battery: 1 x 3V CR2032 (included) Size: 154x30x14(mm) Material:ABS colour:Yellow+blue+green Package Contents: 1 x PH Meter(yellow) 1 x TDS & EC Meter (blue) 1 x soil tester kit (green) 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.