1、WATERPROOF: Water quality tester is designed with upper and lower waterproof rings, you can monitor water quality without fear of the monitor not working when exposed to water. 2、REPLACEABLE: Digital water quality tester can replace the electrode, PH pen reusable, both resource saving and environmental protection, and the service life is also long. 3、AUTOMATIC CALIBRATION: Digital water quality meter can be automatically calibrated, PH value and temperature dual display, so you can more intuitive to know the real situation of water. 4、TEMPERATURE MONITORING: Water quality meter not only can detect water quality, it is also a temperature sensor, which can detect the temperature of water, very convenient and quick. 5、SMALL AND CONVENIENT: Water quality detector is the shape of a pen, small size and light weight, when using it will not take up too much space, but also convenient to carry around. 1 x Water Quality Tester1 x Instruction Manual3 x Testing Powder Package Item Type: Water Quality TesterMaterial: ABSGross Weight: Approx. 166g/ 5.9ozMeasurement Range: PH: 0.01- 14.00℃: 0-60℃Error: ± 0.05PHResolution: 0.01PHBattery: 3 x LR44 (Shipped Without Battery)Use: Ideal for Testing Water, Swimming Pools, Aquariums, Spas, Hydroponics