Model Number: ez-9909 Display Type: Digital Backlight: Yes Multi-functional water quality tester Conductivity measurement range: 0 to 10000uS/cm, 10.01-19.99ms, 20.1-400ms/cm; accuracy: 2% of reading TDS measurement range: 0 to 1000ppm, 1000ppm to 10000ppm, 10.1 to 200.0 PPT Salinity measurement range: 0.00 to 25.00%; resolution: 0.01% pH measurement range: 0.01-14.00pH; resolution: 0.01pH; accuracy: 0.05pH Color: As shown Material: Plastic Package Contents: 1 x 5-in-1 Water Quality Tester (with backlight) 1 x English Manual Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm. Only the above package content is included; other products are not included.