Test the water quality so you can drink or use it with more confidence. If you are interested in this product, give it a try, you won't be disappointed. Mobile APP remote viewing: After correctly connecting to the mobile phone through BT, all test results can be viewed on the APP. Large LCD display with backlight: The large display with backlight allows you to read test data normally even in dim light or even complete darkness, and you can turn on/off the backlight of your phone. IP67 waterproof: IP67 waterproof rating allows this product to be used normally in water and provides a long service life. You can set the upper or lower limit of PH/EC/ORP as needed, and when the test result is higher or lower than the range, the value will be displayed in red to remind you. Specifications: Material: Plastic PH: Range: 0.1-14.0pH Resolution: 0.1pH Accuracy: 0.1pH CL: Range: 0.1-4.0mg/L Resolution: 0.1mg/L Total dissolved solids: Range: 0-999ppm, 1000 -9990ppm Resolution: 1ppm, 10ppm Accuracy: 2%FS ORP: Range: -999 43;999mV Resolution: 1mV Accuracy: 15mV Temperature: Range: 0.1~80xff0c;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 coefficient: 0.1-3.0 (factory default 0.5) Compensation: 0.1- 3.0%/(factory default 2.0%/C) BT: 5.2 version Waterproof: IP67 Battery: 3 AAA batteries (included) Data storage: can store the latest 1000 pieces of data Packaging size: 160 * 100 * 100mm / 6.3 * 3.9 * 3.9 inches Packing weight: 210g / 7.4 oz Packing list: 1 * Water quality tester