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 ～ 14.00 Resolution: pH 0.01 Accuracy: pH ± 0.1 Temperature Compensation: 0℃ ～ 50℃ (32°F ～ 122°F) Environmental temperature: 0℃ ～ 50℃ (32°F ～ 122°F) 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 / 2.0oz 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 * Screwdriver