The GPS handbook IP67 is waterproof and can be used in rainy days. The casing is very sturdy and easy to use. The currently displayed data can be recorded manually or automatically at the time interval set by the user. The built-in GPS module is a major feature of the handbook. Users can see the latitude and longitude geographic location corresponding to the water quality data in real time, eliminating the need for additional GPS or handwritten remarks for water quality points. After the measurement is completed, connect the GPS notebook to the computer via the matching USB cable, download the data or automatically generate a text report. In addition, you can also export to GOOGLE file format, import GOOGLE map or GOOGLE map to see the distribution of water quality points more intuitively.