Feature: 1. It is a multi‑functional water quality meter that can measure the pH/temperature/EC/CF/TDS of the solution. 2. Easy to calibrate, just use a mini screwdriver to easily perform pH and TDS calibration. 3. Suitable for fountains, aquariums, hydroponics, spas, swimming pools and other water systems. 4. Large and clear display screen, easy to read the displayed value. You can monitor online for a long time. 5. Lightweight and portable design, convenient for indoor and outdoor use. Made of high quality material, durable. Specification: Item Type: Water Quality Tester Material: Plastic Color: As shown in the picture Weight: Approx. 643g / 22.7oz Battery: AA NI-MH battery 110mah (built-in battery) Measuring Range: PH: 0.00~14.00PH Temperature: 0℃~50℃ EC: 0.00~19.99EC CF: 0.0~199.9CF TDS: 10~9990PPm Resolution: PH: 0.01PH Temperature: 0.1℃ EC: 0.01EC CF: 0.1CF TDS: 10ppm Accuracy: PH±0.1PH Temperature: ±1.0℃ EC, CF, TDS: ±2%F.S How to Use 1. Insert the measuring probe into the instrument. 2. Plug in the power connector. 3. Put the monitoring head into the liquid to be monitored. 4. The value can be displayed. . Package List: 1 x Water Quality Tester2 x Probe2 x Suction Cup1 x Screwdriver1 x Adapter1 x Plastic Bracket1 x Instruction Manual