Feature: 1. Horizontal Display: PH meter screen is designed to display horizontally, PH value and temperature value can be read at the same time, making your work easier. 2. Backlight: Backlight function, you can measure anytime and anywhere for your convenience, suitable for monitoring the water quality condition of fishbowl, measuring pH value of well water, alkaline tap water and other beverages. 3. Automatic Temperature Compensation: PH meter has automatic temperature compensation function, no need to care about the temperature of the measured liquid, you can measure the PH value quickly. 4. Pocket Size: Pocket size, light weight, small size, easy to carry and store, easy to carry and use even on the go. 5. Simple Operation: Turn on the switch, put the probe into the water and stir (make the small glass ball fully touch the liquid), wait for the value to be stable and then you can read the value. Specification: Item Type: PH Tester Digital Material: ABS Plastic Measuring Range:0.00 to 14.00PH Resolution:0.01PH Error:±0.01ph Operating Temperature: 0℃ to 60℃ Battery: 1.5Vx2 LR44 Type Button Battery (Shipped with Button Battery) PH Battery Capacity: 160mAh The PH Meter Shall Be Recalibrated in the Following Cases: 1. It Has Been Used (or Left) for a Long Time After Calibration 2. Inaccurate Appearance Occurs Size: Approx. 154.5 x 31mm / 6.1 x 1.2in Color: Yellow. Package List: 1 x PH Tester Digital (Shipped with Button Battery)3 x Buffer Powder1 x User Manual