the water quality of the tested water, so that you can drink or use more at ease. If you are interested in this product, come and have a try, it will not let you down. Mobilephone APP Remote View: After connect with your mobilephone correctly through the BT, all testing results can be viewed on the APP. Large LCD Display Screen with Backlight: The large display screen with backlight allows you to read the testing data normally even in dim light or even in total dark, and you can turn on/off the backlight on your mobilephone. IP67 Waterproof: The IP67 waterproof level makes this product can be normally used in water and can provide a long service time. You can set a high or low PH/EC/ORP limit according to your needs, when the test results is above or below the range, the value will be displayed in red to alarm you. Specifications: Material: plastics PH: Ranges: 0.1-14.0pH Resolution: 0.1pH Accuracy: 0.1pH CL: Ranges: 0.1-4.0mg/L Resolution: 0.1mg/L Total Dissolved Solids: Ranges: 0-999ppm, 1000-9990ppm Resolution: 1ppm, 10ppm Accuracy: 2%F.S ORP: Ranges: -999 43;999mV Resolution: 1mV Accuracy: 15mV Temperature: Ranges: 0.1~80 xff0c;32.1~176.0 Resolution: 0.1 Accuracy: 0.5 Calibration: pH: 6.8/4.0/9.2 or 7.0/4.0/1.0 ORP: 256mV ATC temperature: 0.1~60 Environment: 0.1~80, RH: max 90% Total Dissolved Solids factor: 0.1-3.0 (factory default 0.5) EC Temp. Compensation: 0.1-3.0 %/ (Factory Default 2.0 %/C) BT: 5.2 version Waterproof: IP67 Battery: 3 * AAA battery (included) Data storage: can store the latest 1000 records of data Package size: 160 * 100 * 100mm / 6.3 * 3.9 * 3.9in Package weight: 210g / 7.4ounce Packing list: 1 * Water Quality Tester