The professional pH meter is a perfect tool for testing your water level. Suitable for aquarium swimming pool and water environment. Features: Qualified pH meter with replaceable electrode. Large and clear LCD with backlight, easy to read and measure functions accurately. Simple to use, strong and durable in use. Reliable basic glass electrode pH meter. ATC function. CE and RoHS certified to offer safer and precise measurement. Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Very practical for changing your electrode, and complete with different industry testing 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 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 / 2.0oz Package 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