Documentation you can find at the bottom of the details page - Product guides and documents: (User Manual (PDF), which contains details on how to use and links to the drivers. The product documentation link cannot be displayed. If you need technical documentation, please click “Geekstory” to em-ail us. VK-172 automatically adapt the baud rate. The baud rate has any data output. The default output is the product GPS protocol data. You can test the software or serial commands to modify switch GPS/GLONASS protocol data. VK-172 gps is NOT plug and play for most device. You need to install driver before make it work. Raspberry Pi and linux no need driver. (Drivers and links to documentation you can find on the details page of the user manual.). VK 172 USB GPS works with Windows, Android, Linux, Raspberry PI and Google Earth, not for IOS system.