7-in-1 multi-parameter water quality tester for measuring PH, TDS, EC, ORP, S.G, Salinity and Temperature. Suitable for pools, drinking water and other applications. Model: C-600A (with backlight) / C-600 (optional) EC: Measurement range 0-10000uS/cm, 10.01-19.99ms, 20.1-400mS/CM; Resolution 1uS/cm, 0.1mS/CM; Accuracy 2% of reading TDS: Measurement range 0-1000ppm, 1000-10000ppm, 10.1-200.0ppt; Resolution 1ppm, 0.1ppt; Accuracy 2% of reading Salinity: Measurement range 0.00-25.00%; Resolution 0.01%; Accuracy 0.01-5.00% (0.1%), 5.10-25.00% (1%) PH: Measurement range 0.01-14.00pH; Resolution 0.01pH; Accuracy 0.05pH ORP: Measurement range 0~999mV S.G: Measurement range 1.000~1.222 Working environment: 0-60.0°C (32.0-140°F), RH 100% TDS factor: 0.4-1.0 Temperature range: 0.1-60.0°C (32.0-140°F); Accuracy 0.5°C; Resolution 0.1°C/F Power source: 3x1.5LR44 (not included) Size: 183*37*37mm (7.2*1.5*1.5in); Weight: 105g (3.2oz) Package List: 1*7 in 1 meter, 1*English manual (no retail box included) Precautions: Always clean the electrode after each use. If pH calibration fails to identify the solution, the electrode may be damaged. Color: As shown in the picture