Features 1 Multi function Meter with Bluetooth mobile phone APP intelligent control mobile phone full screen multi parameter display professional measurement of Dissolved oxygen concentration and Temperature The mobile phone can control the backlight Drinking water Aquarium Fish Tanks Swimming Pool Farmland irrigation Laboratory Etc 2 Cloud Based Data Management System Precision real time Bluetooth data transmission Synchronize save time and data record Share data or print excel tables the mobile phone can view the calibration record 3 Automatic Calibration Tester With high sensitive replaceable probe easy to operate automatically calibrate pH two sets of calibration points are optional4 Multifunctional Meter with Automatic Temperature Compensation Temperature can affect reading levels digital pH tester has an even better range of0 1 40 °C 32 1 104 0°F automatic temperature compensation can ensure that you are getting the best reading so you can test with confidence in any environment 5 High Accuracy Water Tester High accuracy algorithm chip and electrode of our digital water quality tester ensure an accurate and fast reaction EU CE certification Chinese English switching backlight LCD design read the measurement results at any time One key to lock the reading function you can view the data at any time Can be set to automatically manually save data It can detect water data changes for a long time and automatically set the time inter