SpeedyBee F405 Mini + BLS 35A 4-in-1 ESC Stack — 20×20mm, Bluetooth Betaflight Tuning, DJI O3 Air Unit/Vista/Link Compatible

Small 20×20mm footprint designed for tight builds — perfect for 2–4 inch racers and light 5-inch quads. This compact F405 Mini flight controller is paired with a BLS 35A 4-in-1 ESC to deliver high performance in a minimal package. Wireless configuration is built in: an integrated Bluetooth radio lets you tune Betaflight settings directly from the SpeedyBee app without wires. The ESC provides genuine 35A continuous current and includes TVS surge protection for added electrical robustness. Digital FPV ready — the stack offers plug-and-play compatibility with DJI O3 Air Unit as well as DJI Vista and Link systems, simplifying installation of DJI digital setups. Power delivery is handled by dual BEC outputs: 5V/2A and 9V/3A to feed cameras, VTX units, and other accessories reliably. Convenience and flight aids: the board includes an onboard barometer, an 8MB blackbox for logging, a 4-level battery indicator, and gyro power isolation to improve sensor stability. Motor direction can be changed remotely via the SpeedyBee app, so you can swap prop rotation without rewiring. Everything needed to install is included: capacitor, wiring harnesses, and both M2 and M3 mounting hardware with silicone dampers for vibration reduction. Ideal for pilots building compact FPV race or freestyle drones who want wireless tuning and DJI digital compatibility.