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. Large 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 / 46.5in Power supply: DC 6V (Power-supply Adaptor) Battery: 4x1.5V -13 Button Cell Batteries (NOT Included ) Accuracy: pH: 0.1pH EC: 0.01 ms/cm Resolution: pH: 0.01 EC: 0.00 ~ 19.99ms/cm Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC100-240V Colour:As Shown Material:plastic Package Contents: 1 x Water Quality Tester Only 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.