The PH-80 is an economically priced, reliable pH meter (aka pH pen or pH tester) that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water, boilers and cooling towers, wastewater and more. The PH-80 measures pH and Temperature. Features include one-touch automatic digital calibration,water resistant body, simultaneous temperature display, sleek, lightweight design, a large LCD display, Automatic Temperature Compensation (ATC), Auto-off function, data-hold function and low-battery indicator. Each meter includes storage solution and a single use pH 7.0 buffer pack. The PH-80 is factory calibrated for your convenience and can easily and quickly be recalibrated with digital calibration to pH 4.0, 7.0 or 10.0 using the meter"s simple one-touch process. Includes a cap, batteries, storage solution and pH 7.0 buffer.