Description:2-In-1 pH meter and thermometer, highly accurate for measuring range of 0-14 pH, 0.01pH / 0.1pH resolution, measure and display pH result simultaneously with LCD diplay, reliable and quick reading.Just remove the protective cap and immerse the PH meter in the solution and turn on the PH by ON / OFF switch to be measured, beats the heck out of trying to see the colors of a litmus strip.Easy to calibrate, you can simply follow the user manual, immerse the PH tester in the solution and adjust with the provided screwdriver to dial it in.Pocket size, you can put it in your pocket wherever you go outside for a PH testing, it also comes with a handy storage case and dedicated screwdriver for calibrating.Please be careful with the glass probe since it may be a little fragile when you use, and remember to gently wipe it with a clean, soft cloth when you are done before capping it again.Specification:Model: K13Type: pH Meter and Thermometer (2-In-1)pH Measuring Range: 0-14.0 pHResolution: 0.01pH / 0.1pHTemperature Measuring Range: 0.0-50.0 degrees Celsius (32-122 degrees Fahrenheit), 2 display modes for optionResolution：0.1 degrees Celsius / 1 degrees FahrenheitVoltage detection Range: 0-828mVResolution：1mVMeter CalibrationLock FunctionLow Voltage TipsWorking Voltage: 3.3VMaterial: ABSColor: WhiteSize: Approx. 205x75x45mm/ 8.07x2.95x1.77 inchPackage Includes:1 Piece of Waterproof Digital pH Meter Pen