Fangrui Product Details 1. Ez-9909 Phsalinitytemperaturetdsec 5-in-1 Test Pen Multifunctional Water Quality Detector 2. Conductivity Test Range: 0 To 10000uscm; 10.01-19.99ms; 20.1-400mscm 3. Resolution: 1uscm; 0.1mscm 4. Accuracy: +- Of Reading 5. Tds Test Range: 0-1000ppm; 1000ppm-10000ppm; 10.1-200.0ppt 6. Resolution: 1ppm; 0.1ppt 7. Accuracy: +- Of Reading 8. Salinity Measurement Range: 0.00-25. 9. Resolution: 0. 10. Accuracy: 0.01-5. (+-0.); 5.10-25. (+-) 11. Ph Test Range: 0.01-14.00ph 12. Resolution: 0.01ph 13. Accuracy: +-0.05ph 14. Temperature Compensation: Automatic Temperature Compensation (atc) 15. Working Environment: 0-60.0 Degrees Celsius (32.0-140 Degrees Fahrenheit); Rh 16. Tds Factor: 0 .4-1.0 17. Temperature Range: 0.1-60.0 Degrees Celsius; 32.0-140 Degrees Fahrenheit 18. Temperature Accuracy: +-0.5 Degrees Celsius 19. Temperature Resolution: 0.1 Degrees Celsiusfahrenheit 20. Automatic Shutdown: 5 Minutes 21. Waterproof Rating: Ip67 22. Battery: 3x1.5lr44 Button Battery (not Included In Delivery) 23. Display Size: 3.3x2.4 Cm 24. Dimensions: 18.3x3.7x3.7 Cm 25. Weight: 90 Grams