2-in-1 combo meter for water quality: large, clear measuring screen with backlight, displays pH and temperature measurement results simultaneously Easy to use: 2 buttons - Power button and C/F button, ideal for beginners and professionals. Power supply: battery powered or 6V DC power adapter, ideal for continuous monitoring Replaceable pH Electrode: Detachable and replaceable BNC type pH electrode, no need to change the whole water quality even after long time using. Simple pH electrode replacement saves your costs. Applications: Suitable for most home and professional pH testing and water quality monitoring applications, including aquariums, hydroponics, swimming pools, drinking water, laboratories and so on Functions: 2 pH and temperature tester in 1 With ATC that offers high accuracy. Clear display and double measurement Manual 1 point calibration. Features: Range: pH 0.00 ~ 14 .00. Temperature: 0C ~ 50C. Resolution: pH 0.01. Temperature: 0.1C. Accuracy: pH 0.1. Temperature: 1C. Temperature compensation: 0C ~ 50C (-32F ~ 122F) Environment temperature: 0C~50C (-32F~122C). Power: DC 6V (power adapter usable). Battery: 4 x 1.5V AG-13 button cell batteries (not included). Colour: yellow. Material: ABS. Length of temperature sensor: approx. 90.5 cm. Length of pH electrode: approx. 119 cm. Approximate dimensions: 7.5 x 6.7 x 2.5cm (without the temperature sensor). Item weight: about 57.9g (temperature tester body) pH and temperature). Package dimensions: approximately 21 x 10.4 x 5 cm. Weight of the package: about 299g. Note: The data are all manual measurement, please allow 1-3cm error, due to the difference in light and temperature. display, there will be some color difference, depending on the physical item received.