# Overview ![](https://2367252986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLIgtGDAvVGkCKGOJb1bR%2Fuploads%2FJWdGFWwz4fQyXMcLTaCm%2Fimage.png?alt=media\&token=0c995d2c-326d-4827-93fc-ba4c40baade7) ### Overview H-RTK F9P is the latest differential high-precision GNSS positioning system series from Holybro. This system provides multi-band RTK with fast convergence times and reliable performance, concurrent reception of GPS, GLONASS, Galileo and BeiDou, and fast update rate for highly dynamic and high volume applications with centimeter-accuracy. It uses a UBLOX F9P module, a IST8310 compass, and a tri-colored LED indicator. It also has a integrated safety switch for a simple and convenient operation. ### **Features** We have designed three models of H-RTK F9P for you to choose, each with different size and antenna design to meet different customer needs. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.holybro.com/gps-and-rtk-system/f9p-h-rtk-series/standard-f9p-uart/overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.