Airgineers Micro Drones - Airgineers 701422, This Airgineers F411-BVT Flight Controller is suitable for use with the RX21 Pro receiver and the NANO 3 camera. This product is an ideal replacement for pre-soldered flight controllers. For use with the Airgineers range: Design, Build, Fly, Compete! Airgineers F411-BVT Flight Controller