The uBlox GPS with Compass Kit from 3D Robotics allows the flight controller to connect to GPS satellite to receive precise navigational data. In addition, the compass provides heading data. the uBox works with PX4, APM, and Pixhawk flight control systems.
The Telemetry Radio Set for Pixhawk Auto Pilot features a 915 MHz radio for U.S.. It allows key flight data - such as speed, altitude, remaining battery voltage, and more - to be relayed to a telemetry-compatible transmitter (radio controller), mobile device, or computer at the ground end. It also enables waypoint-based autopilot courses to be updated in real time. It features a range of up to 1 mile, depending on receiver, environmental conditions, and other factors.