1. Scan the QR code and download the mobile APP software. There are two types of QR code, Android and ios, please scan and download and install according to the corresponding QR code of the mobile phone system.

2. Turn on the Bluetooth function: After the water quality pen is turned on, there is no Bluetooth logo and it cannot connect to Bluetooth. You need to press and hold the power button for 5 seconds, ，and then you can connect to Bluetooth after the Bluetooth logo appears.

3. Turn off the Bluetooth function: After turning on the Bluetooth standard, press the power button for 5 seconds to turn off the Bluetooth function.

【pH Meter with Bluetooth】Professional measurement pH, TDS(ppm), EC(Conductivity), ORP, S.G, Salinity(ppt), and Temp. suitable for household drinking water, hydroponics, lab, aquarium. It can be used as a classic tester even if it is not connected to a smartphone.It can be used as a classic tester even if it is not connected to a smartphone.

【Cloud-Based Data Management System】Accurate real-time Bluetooth data transmission and clear measured values make it easy for you to save, manage and share test data without worrying about data loss.

【Automatic Calibration pH Tester】With high sensitive glass probe, you can get a full measurement range of 0-14pH, 0.01 pH resolution. Compared with other pH meters, the pH is a 3-point calibration method, and our pH is a 5-point calibration method and equipped with a calibration powder (Asia Standard: pH 4.00, pH 6.86, pH 9.18, and EU Standard: pH 7.00, pH10.01), you can calibrate effortlessly to ensure the accuracy of your measurements.

【Comprehensive Information Display】Simply immerse the pH meter electrode in the solution to be tested, readings are quickly displayed on a large LCD display. multi-parameter display at the same time, mobile phone APP control backlight display.

【Multifunction Salinity tester】Salinity Range is 0-10000ppm, Salinity tester has an automatic temperature compensation function(32°F~140°F), which can decrease the error caused by the change of liquid temperature.

【Easy to Use】Digital pH meter fully customizable parameter settings. the App can set the upper and lower limits of pH, which can be set according to your needs. when the value you set exceeds the test range, the App interface will display a red value abnormally, notifying you of any values exceeding your preset range.