Great Performance Great choice for water quality monitor. Large digital backlit LCD screen, 0.01 resolution, quick and easy readings even in the dark. Wide Applications Perfect for wide applications, such as beverage, fish hatcheries, food processing, aquarium, photography, laboratory, quality control, school & colleges, swimming pools, water conditions. 　 Features ㋡ Test temperature in degrees / Fahrenheit(switchable unit). ㋡ Use to measure the pH & EC & TEMP of solution. ㋡ Electrode probe can be replaced, ATC function. ㋡ Easy to carry and simple to operate. ㋡ Easy calibration of pH and EC with just a mini-screwdriver. ㋡ Automatic temperature compensation. ㋡ Large and clear LCD with backlight, easy to read and accurately measuring functions. ㋡ Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Specifications Range: pH: 0.00 ～ 14.00pH EC: 0.00 ～ 19990us/cm Temperature: -50 ～ 70℃ (-58℉～ 158℉) Resolution: pH: 0.01pH EC: 10us/cm Temperature: 0.1℃ (0.2℉) Accuracy: pH: ±0.1pH EC:±2%F.S Temperature: ±1℃ (±2℉) Temperature Compensation: 0℃ ～ 50℃ (32℉～ 122℉) Working temperature: 0℃ ～ 50℃ (32℉ ～ 122℉) Power Supply: DC 6V Battery: 4×1.5V AG-13 Button Cell Batteries ( Included) Color: Grey Material: ABS Item Size: Approx. 188 * 35 * 35mm Item Weight: Approx. 80g Package Size: Approx. 21 * 10.4 * 5cm / 8.3 * 4.1 * 1.9in Package Weight: Approx. 158g / 5.6oz 　 Package Included 1 x LeaningTech pH/EC/TEMP Meter (Battery Included) 1 x User Manual 1 x Mini Screwdriver 2 x Buffer Powder (4.00 and 6.86)