HIGH QUALITYDURABLEIt is highly accurate for 0-14PH measuring range, 0.01PH resolution, working temperature: 0~80 EASY TO USEYou only need to remove the protective cap and immerse the pH meter electrode in the solution and turn on the PH by the "ON/OFF" switch to measure. EASY TO CARRYCompact and lightweight, can be easily stored in your bag or pocket, convenient to carry. WIDE USAGE PH Meter is the perfect test kit for home and home uses. in laboratory. Ideal use for testing water, swimming pools, aquariums, spas, hydroponics, food, wine and beer making and more. NotePlease note that the probe of the PH pen is made of glass, which is fragile. Please don't bump into things. Once damaged, it cannot be replaced. You must protect the probe well. After use, gently aspirate the water from the probe with absorbent paper.