Easy to use, high accurancy. Quick and easy installation and operation. This is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket. Has automatic temperature compensation. 5 minutes no operation, the meter will automatically shut down. Save power, extend battery life. (Battery is not included) Specification: Measuring range: 0.00-14.00PH Measurement accuracy: 0.05ph Resolution: 0.01 Material: Plastic Size Chart: 187x37x37mm/7.36x1.46x1.46inch Package Includes: 1 Piece pH Meter 1 Piece Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!