Features: 13-in-1 meter design. It can be used to measure the pH, EC, and temperature of the solution. User-friendly design. Automatic temperature compensation, replaceable electrode probe, easy calibration of pH and EC with a mini-screwdriver. Temperature measuring range between 0~50°C, able to withstand harsh conditions, offering longer durable service. Large and clear LCD with backlight, easy to read with accurate measuring functions. Ideal for use in water sources, aquariums, hydroponics, laboratories, scientific testing, spas, swimming pools, and other water systems. Pocket-sized design with hanging hole, easy to carry, simple to operate, and convenient for storage. Specifications: The water quality monitor is a professional and useful tool for testing pH, EC, and temperature levels of solutions. It features a pen-style design with a portable size suitable for various applications such as beverages, fish hatcheries, food processing, aquariums, photography, laboratories, quality control, schools, colleges, swimming pools, and water condition monitoring. Condition: Material: ABS Color: Grey Power Supply: DC 6V Battery: 4 x 1.5V AG-13 batteries (Included) Working Temperature: 0~50°C (32~122°F) Compensation Temperature: 0~50°C (32~122°F) Accuracy: - pH: ±0.1 pH - EC: ±2% F.S - Temperature: ±1°C (±2°F) Resolution: - pH: 0.01 pH - EC: 10 µS/cm - Temperature: 0.1°C (0.2°F) Measuring Range: - pH: 0.00~14.00 pH - EC: 0.00~19990 µS/cm - Temperature: 0~50°C (32~122°F) Product Size: Approx. 18 x 35mm (7.1 x 1.4 inches) Package Weight: Approx. 169g Package Included: 1 x pH/EC/TEMP Meter Note: The new or old version of this product may be shipped at random. Please ensure you are comfortable with this before ordering.