Features:Test temperature in / (switchable unit).Use to measure the pH & EC & TEMP TDS of solution.Electrode probe can be replaced, ATC function.Easy to carry and simple to operate.Easy calibration of pH and EC with just a mini-screwdriver.Automatic temperature compensation.Large and clear LCD, without backlight, easy to read and accurately measuring functions.Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems.Specifications:Range: pH: 0.00 14.00pHEC: 0.00 19990us/cmTemperature: -5070 (-58158)Resolution: pH: 0.01pHEC: 10us/cm Temperature: 0.1 (0.2)Accuracy: pH: 0.1pH EC:2%F.STemperature: 1 (2)Temperature Compensation: 0 50 (32 122)Working temperature: 0 50 (32 122)Power Supply: DC 6VBattery: 41.5V AG-13 Button Cell Batteries (NOT Included)Color: GreyMaterial: ABSPackage includes:1 * pH & EC & TEMP & TDS Meter1 * User Manual