The professional pH meter is the perfect tool to test your water level. Suitable for aquarium swimming pool and environment water. Features: Qualified pH meter with replaceable electrode. Large, clear LCD display with backlight, functions easy to read and accurate measurements. Simple to use, sturdy and durable to use. Reliable basic glass electrode pH meter. ATC function. CE certified and RoHS to provide more safe and accurate measurement. Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Very convenient to change its electrode, and complete with various industry testing needs. Features: Range: pH 0.00 14.00 Resolution: pH 0.01 Accuracy: pH 0.1 Temperature compensation: 050 (32F122F) Ambient temperature: 050 (32F122F) Calibration mode: ATC Battery: 4 x 1.5 V AG-13 button cell batteries (not included) Color red Material: ABS Ta 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