Feature:1. Water quality analysis instrument supports long term online monitoring, suitable for measuring the PH and EC value of the solution.2. Equipped with large and clear LCD backlight screen, easy to read and provides accurate measurement functions.3. Support automatic temperature compensation function, which can provide safer and more accurate measurement.4. PH measurement range is 0.0014.00pH, EC measurement range is 0.0019.99ms/cm, high resolution.5. Can be easily calibrated with only a small screwdriver, suitable for water sources, aquariums, hydroponics, swimming pools, etc.Specification:Item Type: PH EC TesterMaterial: PlasticWeight: Approx. 377g / 13.3ozBattery Attributes: 4 x LR44 Button Battery (Battery Not Included)Battery Capacity: 4 x 160mAhRange: PH: 0.00-14.00pHEC: 0.00-19.99ms/cmResolution: PH: 0.01pHEC: 0.01ms/cmAccuracy: PH: 0.1pHEC: 2%F.SPower Supply: DC 6V (Available Power Adapter)Temperature Compensation: 0-50Working Temperature: 0-50Application: Suitable for water systems such as water sources, aquariums, hydroponics, hot springs, swimming pools, etc..Package List:1 x Tester (Battery Not Included)1 x Probe1 x Adapter2 x Suction Cup1 x Screwdriver1 x Black Bracket1 x Manual