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