Model Number: ez-9909 Display Type: Digital With Backlight 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 the 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 Note: Light shooting 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 +/- 1-3 cm.