Feature: 1. Replacement Probe: The PH test pen of the probe can be replaced, and the same host can be reused, which can save costs, prolong the service life, and has strong practicability. 2. Easy to Calibrate: The main unit is calibrated by keys, which is convenient, quick and accurate, changing the mode of using screwdrivers to calibrate similar products. 3. High Accuracy: The international calibration standard (4.00 7.00 10.00) is designed, using probe, the value is more accurate and the reflection is more sensitive. 4. Use Parameters: PH test pen applicable pH range: 0 & 8209; 14ph, temperature range: 0& 8209;55°C, 32& 8209;130°F; housing IP67 waterproof. Comes with a lanyard for easy portability. 5. Uses: PH meter is suitable for all pH testing, water purification applications, wastewater conditioning, aquaculture, hydroponics, , laboratory and scientific testing, swimming pools and spas. Specification: Item Type: PH Test Pen Material: ABS PH Range: 0 - 14PH Temperature Range: 0-55& 8451;; 32-130°F Resolution: PH: 0.01 PH Temperature: 0.1& 8451;/°F Accuracy: +0.1PH Temperature Compensation: Automatic ((ATC) to 25& 8451; ((ATC Range: 1-50& 8451;) Calibration: Automatic Calibration to 4, 7 or 10 PH with Fine Tuning Digital Calibration Button. Housing: IP67 Waterproof (Submersible; Float) Battery: 2 x AAA (Not Included) Gross Weight: Approx. 160g/5.6oz Uses: for All PH Testing, Water Purification Applications, Wastewater Conditioning, Aquaculture, Hydroponics, , Laboratory and Scientific Testing, Swimming Pools and SPAs, Ecological Testing, Boilers and Cooling Towers, Water Treatment, Wine, Coffee, Agriculture, Etc. Package List: 1 x PH Test Pen 1 x Manual 3 x Testing Powder 1 x Lanyard