ITEM NAME:2-In-1 Digital pH Meter Thermometer Water Hydroponics Pocket Pen Tester Aquarium 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: K13 Type: pH Meter and Thermometer (2-In-1) pH Measuring Range: 0-14.0 pH Resolution: 0.01pH / 0.1pH Temperature Measuring Range: 0.0-50.0 degrees Celsius (32-122 degrees Fahrenheit), 2 display modes for option Resolutionï ¼Å¡0.1 degrees Celsius / 1 degrees Fahrenheit Voltage detection Range: 0-828mV Resolutionï ¼Å¡1mV Meter Calibration Lock Function Low Voltage Tips Working Voltage: 3.3V Material: ABS Color: White Size: Approx. 205x75x45mm/ 8.07x2.95x1.77 inch Package Includes: 1 Piece of Waterproof Digital pH Meter Pen SKU: DMO0001362570004055.Resolution: 0.01pH / 0.1pH. Lock Function. Size: Approx.