The professional pH meter is a perfect tool to test your water level. Suitable for aquarium pool and environmental water. Features: Qualified pH meter with replaceable electrode. Large and clear LCD with backlight, easy to read and accurately measure functions. Simple to use, strong and durable in use. Reliable basic glass electrode pH meter. ATC function. CE and RoHS certified to offer safer and accurate measurement. Application in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Very convenient to change its electrode, and complete with different industry test needs. Features : Range: pH 0.00 ~ 14.00 Resolution: pH 0.01 Accuracy: pH 0.1 Temperature Compensation: 0~50 (32F~122F) Ambient Temperature: 0~50 (32F~122F) Calibration Mode: ATC Battery: 4 1.5V AG-13 button cell batteries (not included) Color Red Material: ABS Item Size: Approx. 18 * 5 * 2.5cm / 7.1 * 1.9 * 1.0in Item weight: approx. 57.1g / 2.0ozPackage size: approx. 21 * 10.4 * 5cm / 8.3 * 4.1 * 1.9in Package weight: approx. 144g / 5.1oz Package List: 1 * PH METER 1 * User Manual 1 * Mini Screwdriver