The professional pH meter is perfect tool for testing your water level. Suitable for aquarium pool and environment water.Features:Qualified pH meter with replaceable electrode.Large and clear LCD with backlight, easy to read and accurately measuring functions.Simple to operate, strong and durable to use.Reliable basic glass electrode pH meter.ATC function.CE and RoHS certificated to offer safer and precise measurement.Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems.Very convenient to change its electrode, and completes with various industry test needs.Specifications:: pH 0.00 14.00Resolution: pH 0.01Accuracy: pH 0.1Temperature Compensation: 0 50 (32F 122F)Environmental temperature: 0 50 (32F 122F)Calibration Mode: ATCBattery: 41.5V AG-13 Button Cell Batteries (NOT Included)Color: RedMaterial: ABSItem Size: Approx. 18 * 5 * 2.5cm / 7.1 * 1.9 * 1.0inItem Weight: Approx. 57.1g / 2.0ozPackage Size: Approx. 21 * 10.4 * 5cm / 8.3 * 4.1 * 1.9inPackage Weight: Approx. 144g / 5.1ozPackage List:1 * PH Meter1 * User Manual1 * Screwdriver