HIGH ACCURACY PH METER: This pH meter uses a sensitive glass bulb electrode sensor to quickly and clearly display accurate pH values within the 0–14.0 range. It offers 0.01 resolution for precise measurements. AUTOMATIC CALIBRATION: The meter features automatic calibration that adjusts based on water temperature and quality. Calibration can also be performed using the one-touch CAL button with included calibration buffer powder. AUTOMATIC TEMPERATURE COMPENSATION (ATC): Built-in temperature sensor enables automatic temperature compensation across 0°C–80°C (32°F–176°F), ensuring accurate pH readings regardless of sample temperature. PORTABLE DESIGN: Compact and lightweight, it fits easily in a pocket or bag—ideal for home, laboratory, pool, aquarium, RO systems, spas, and hydroponics applications. COMPLETE KIT INCLUDES: 1 x pH meter, 1 x user manual, 2 x 1.5V LR44 button cells (pre-installed), and 3 x pH buffer powders. The included manual provides clear instructions for achieving accurate and stable readings.