1. Model Number: ez-9909 2. Display Type: Digital 3. With Backlight Or Not: YES 4. Multi-functional water quality tester 5. Conductivity measurement range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms/cm. accuracy: ±2% of the reading 6. TDS measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPT 7. Salinity measurement range: 0.00 to 25.00% resolution: 0.01% 8. PH measurement range: 0.01-14.00pH, resolution: 0.01pH, accuracy: ±0.05pH 9. Colour:As shown 10. Material:plastic 11. Package Contents: 12. 1 x 5 in 1 Water quality tester(with backlight) 13. 1 x English manual 14. Only the above package content, other products are not included. 15. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.