Features: Wide Use: Great for household or laboratory use; Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics; Appropriate for wide range of applications Fast And Accurate: Ensure your pool, general hydroponics ph or even drinking water has a perfect pH balance and safe for use with Tester precision pH accuracy. Tester has a sensitive electrode sensor to read accurate pH levels. The included detailed manual will show you how to get the best accurate and stable reading Auto Calibration: The PH meter has an auto temprature compensation feature that adjusts to water temperatures and water quality to give pH readings almost instantly. As well, you can calibrate the tester with one touches button using Buffer Powder. Lightweight And Easy To Use: Just remove the protective cap and immerse the PH meter electrode in the solution and press the button to be measured. Measuring range: 0.00-14.00 pH Resolution: 0.01 pH Accuracy: 0.01 pH Batteries: 2 x 1.5V LR44 (Built-in included) Automatic temperature compensation: 0-50℃(32-122℉) Dimensions: 15x2.5x1.3cm/6x1.1x0.5 inch