2 Pack Portable TDS/PH/EC Water Quality Meter & Temp Test Meter with Backlight Function High Accuracy & 40JEOOTDTY LCD DisplayFeatures: Professional pH Meter, TDS Meter, EC Meter & 4 in 1 Temperature Meter With Calibration Function to Ensure Measurement Accuracy. Portable pH meters and digital TDS meters are equipped with a backlit display. It is suitable for checking the pH and quality of drinking water, food, aquarium, swimming pools, etc. The LCD display clearly displays the data. Small and easy to carry. Specification: Material: PlasticPH: 0-14, You can mention them: 0.01Working temperature: 0-55°COpacking includes: 2x PH6x meter calibration solution powderNote: please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item