Separate pH and EC electrode, precise measurement.Can online monitor for a long time.Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems.Automatic temperature compensation.Use to measure the pH / EC of solution.Easy calibration of pH and EC with just a mini-screwdriver.and clear LCD with backlight, easy to read and accurately measuring functions.Temperature Compensation: 0C ~ 50C (32F~ 122F)Working temperature: 0C ~ 50C (32F ~ 122F)Length of EC/pH Electrode Line: . 118cm / 46.5inPower supply: DC 6V (Power-supply Adaptor)Battery: 4x1.5V -13 Button Cell Batteries (NOT Included )Accuracy: pH: 0.1pH EC: 0.01 /cmResolution: pH: 0.01 EC: 0.00 ~ 19.99ms/cmPlug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on.Voltage: AC100-240VColour:As ShownMaterial:plasticPackage Contents:1 x Water Quality TesterOnly the above package content, other products are not included.Note: Light reflection 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.