Model Number: ez-9909 Display Type: Digital With 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 Only the above package content is included; other products are not included Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement error allowance is +/- 1-3cm