Cakie Digital Meter, 0.01 High Accuracy Quality 0-14 Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC, Yellow Wide Use: Ideal 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 VANTAKOOL Tester precision pH accuracy. VANTAKOOL 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 VANTAKOOL 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 touch button using VANTAKOOL 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. Beats the heck out of trying to see the colors of a litmus strip. Make You Satisfied With The Products: Come with 1x VantaKool PH meter, 1x user manual, 3x 1.5V LR44 button cells(build-in), 3x PH Buffer Powders; 1-Year Warranty.