Features: Easy to Use: Simply Immerse the PH Meter Electrode in the Solution to Be Tested, Readings Are Quickly Display on a Large Lcd Display Wide Application: Ideal Instrument for Any Aquarium, the Fishing Industry, Swimming Pools, Spa, School Laboratories, Food & Beverage, Drinking Water Etc. Auto Calibrated: Features In-built Calibration with 2 Buffer Powders(included).Just Press a Button to Finish the Calibration. This PH Meter is Factory Calibrated. Users Can Use It Directly. Fast and Accurate Results: No Need to Work with Those Annoying Color Charts and Test Strips. Resolution: 0.01 PH, Accuracy: 0.01 PH Compact Portable Design:Pocket Fitting PH Meter That's Also Lightweight and Compact. Total Concealed Fit in Your Bag or Pocket for Easy, Casual Carrying. Specifications: Display: LCD Digital Accuracy: 0.01 Resolution: 0.01 Operating Temperature: 0~60C Measuring Range: ~14.00 Package Includes: 1 PH Tester .