Feature:1. Easy to use, high accurancy.2. Quick and easy installation and operation.3. EC: Support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms)4. Built-in 3 calibration points (1413uS/cm 12.88ms /cm 111.8ms /cm)5. PH:1 point (6.86) or 2 point (6.86 4.00) (6.86 9.18) or 3 point (6.86 4.00 9.18) can automatically identify the calibration solution.6. This is a professional water level test instrument, the operation is simple, the appearance of , small size and easy to put in your pocket.7. Has automatic temperature compensation.8. 5 minutes no operation, the meter will automatically shut down. Save power, extend battery life. (Battery is not included)Specification:Type: with backlight, without backlight (optional)Material: ABSEC: Measuring range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms /cmResolution: 1uS/cm; 0.1 mS/cm;Accuracy: 2% of the readingTDS: Measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPTResolution: 1ppm; 0.1 PPTAccuracy: 2% of the readingSalinity: Resolution: 0.01%Accuracy: 0.01-5.00% (0.1%) 5.10-25.00% (1%)PH:Measuring range: 0.01-14.00pHResolution: 0.01pHAccuracy: 0.05pHOperating environment: 0 to 60.0 (32.0-140); RH 100%TDS factor: 0.4 to 1.0Temperature range: 0.1-60.0 32.0-140Temperature accuracy: 0.5Temperature resolution: 0.1/Battery: 3 * LR44, 1.5V, 160mAhWaterproof rating: IP67Display size: 33*24mmItem size: 180 * 37mm / 7.1 * 1.5inItem weight: 86g / 3.0ouncePackage size: 183 * 37 * 37mm / 7.2 * 1.5 * 1.5inPackage weight: 100g / 3.5ounce Package List:1 * Water Quality Monitor Tester3 * PH BufferPowders1 * PH TestPaper