Feature: 1. PH measurement range is 0.00‑14.00, with high accuracy, small error and convenient measurement ,which can be used at night. 2. With automatic temperature compensation function, easy to use, high stability, so temperature change can't affect on pH level measurement. 3. It is compact and easy to install and use, with replaceable probe, this makes them great for all continuous monitoring applications. 4. It is used to measure the pH and TDS of the solution, and the pH and TDS can be easily calibrated with a small screwdriver. 5. Great for student, professional and even individual used in achieving the correct pH and temperature level in water quality monitoring and analysis. Specification: Item Type: PH Meter Material: Plastic Color: As shown in the picture Product Size: Approx. 75x55x20mm / 2.95x2.17x0.79in Weight: Approx. 343g / 12.1oz Range: PH 0.00~14.00PH Temperature -50℃~70℃ (-58℉~158℉) Resolution: PH 0.01PH Temperature 0.1℃ (0.2℉) Accuracy: PH±0.1PH Temperature: ±1.0℃ (±2.0℉) Battery: DC6V or 4xLR44 button battery (battery not included) Temperature Compensation: 0℃~50℃ Working Temperature: 0℃~50℃ Application: Suitable for water systems such as water sources, aquariums, hydroponics, hot springs, swimming pools, etc. . Package List: 1 x PH Meter(Battery Not Included)1 x Probe1 x Adapter1 x Suction Cup1 x Screwdriver1 x Black Bracket1 x Manual Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.