# HEX/ProfiCNC Here+ RTK GPS (Discontinued) :::info This GPS is no longer available for purchase but is still compatible with PX4. Usage documentation can be found in [PX4v1.11 docs](https://docs.px4.io/v1.11/en/gps_compass/rtk_gps_hex_hereplus.html) ::: The **Here+ RTK GPS receiver** is a small, light and energy efficient [RTK GPS module](../gps_compass/rtk_gps.md), based on the u-blox M8P. 使用RTK，PX4控制器可以获取到它的位置，并且这个位置的精度可以达到厘米级的精度，这比普通GPS提供的位置更加精确。