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. 1 x Water Quality Tester2 x Probe2 x Suction Cup1 x Screwdriver1 x Adapter1 x Plastic Bracket1 x Instruction Manual Item Type: Water Quality TesterMaterial: PlasticColor: As shown in the pictureWeight: Approx. 643g / 22.7ozBattery: AA NI-MH battery 110mah (built-in battery)Measuring Range:PH: 0.00~ 14.00PHTemperature: 0℃~50℃EC: 0.00~ 19.99ECCF: 0.0~ 199.9CFTDS: 10~9990PPmResolution:PH: 0.01PHTemperature: 0.1℃EC: 0.01ECCF: 0.1CFTDS: 10ppmAccuracy: PH± 0.1PHTemperature: ± 1.0℃EC, CF, TDS: ±2%F.SHow 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.