Specification: *1. PH Range(Resolution, Accuracy): 0.00-14.00(0.01pH, 0.5pH) *2. Temperature Range(Resolution, Accuracy): 0.1-60/31.2-140.0(0.1/0.1, 0.5) *3. EC Range(Resolution, Accuracy): 0-9999us/cm, 10.01- 19.99mS/cm, 20.1-400.0mS/cm(1uS/cm 0.1mS/cm, 2% F.S.) *4. TDS Range(Resolution, Accuracy): 0-9999ppm, 10.1- 200.0ppt(1ppm, 2% F.S.) *5. ORP Range(Resolution, Accuracy): 999mv(1mv, 2mv) *6. Salinity Range(Resolution, Accuracy): 0-10000ppm/10.1-200.0ppt/0.01%-25.00%(1ppm/0.1ppt/0.01%, 2%FS./0.01-5.00% (0.1%)/5.1-25.0% (1%)) *7. S.G Range: 1.000 -1.222 *8. Operating Environment: 0.1-80 *9. Operating Humidity: Max 90%(RH) *10. Battery: 3*1.5V LR44 (Not included) *11. Size : 187x37x37mm *12. Weight: 95g *13. Display: LCD digital display *14. Backlight: with(APP control) *15. Temperature: Automatic Temperature Compensation 0-60 *16. PH Calibration: 6.86/4.00/9.18 or 7.00/4.00/10.01 *17. Waterproof: IP67 Tip: *1. One page displays 3 items of data at the same time, which is convenient and quick to read. *2. Use the APP to turn on/off the backlit. *3. Display battery percentage *4. The data can be kept or saved, and after saving, it can be exported as *EXCEL sheet to a computer or mobile phone, and printing is supported. *5. Turn on Auto-Save, and the data will be saved every 30 seconds. *6. The range of PH can be set, if the read is beyond the range, the meter will promote. *7. 2 kinds of calibration methods, the default is the Asian standard (4.01, 6.86, 9.18). If you need to calibrate the European mode (7.00, 4.00, 10.00), please switch the standard on the APP. *8. There are English and Chinese languages, which can be switched.