Widely used to measure the pH / RH / Temperature / Conductivity EC / / TDS(PPM) of solution/water. IC and high cost performance. Test temperature in Centigrade / Fahrenheit (switchable unit). Easy calibration of pH and TDS with just a mini-screwdriver. Can online monitoring for a long time. Colour:Black & Material:plastic Clear LCD with backlight, 3 results displayed simultaneously. Automatic temperature compensation. Easy to use and provides instant display of results. Apply in water sources, aquarium, hydroponics, laboratory, spas, swimming pools and other water systems. Range: pH: 0.00 - 14.00pH RH: 10%RH - 99%RH Temp: -50 - 70 (-58 F - 158 F ) EC: 0.00 - 19.99EC : 0.0 - 199.9CF TDS: 10 - 19990ppm Resolution: pH: 0.01pH RH: 1%RH Temperature:0.1 (0.2 F) EC: 0.01EC : 0.1CF TDS: 10ppm Accuracy: pH: 0.1pH RH: 5%RH Temperature: 1 (2 F) EC,,TDS: 2%F.S Temperature Compensation: 0 - 50 (32 F- 122 F) Working temperature: 0 - 50 (32 F- 122 F) Power supply: DC 6V (Power Adapter Usable) Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. voltage: AC100-240V Package Contents: 1 * Water Quality Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.