Model Number: ez-9909 Display Type: Digital With Backlight Multi-functional water quality tester Conductivity measurement range: 0 to 10000uS/cm, 10.01-19.99ms, 20.1-400ms/cm Accuracy: ±2% of the 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, other products are not included Note: Lighting and different displays may cause slight color differences in the image The measurement allowed error is 1-3cm