This is the Micro Unmanned Telemetry Kit and as you can imagine, this comes with a micro radio telemetry module for your multi-rotor to save on space and weight. This radio kit not only has the benefit of this cool feature (the micro module) but this kit offers you great range (approximately one mile with the supplied antenna) at a great price. The system runs on the 433MHz band and provides a full-duplex link using HopeRF's HM-TRP modules running custom, open source firmware
The SiK firmware includes a bootloader that permits radio firmware upgrades over the serial interface, and configuration of system parameters. Firmware upgrades and configuration are fully supported in the APM Mission Planner. Configuration is also possible through the 3DR Radio configurator and AT commands.
Interface to the module is via standard 5V-tolerant TTL serial / FT230 USB serial.