F405 V2 F4 V3S Flight Controller Stack with 4in1 50A or 65A ESC (30.5 x 30.5 mm) Compact, performance flight controller stack designed for freestyle, racing, and longrange drones. Built for reliable flight control and efficient power delivery in small to large multirotor frames. Key features and benefits Complete stack: F405 V2 flight controller with F4 V3S architecture paired with a 4in1 BLHeliS ESC available in 50A or 65A continuous current versions. Provides a compact integrated solution for clean wiring and reduced build complexity. Flight software and protocols: Compatible with Betaflight and INAV. Supports DShot and common ESC protocols for smooth, lowlatency motor control. Powerful MCU and sensor suite: STM32 F405 microcontroller and MPU6500 gyroscope deliver accurate, responsive flight control and stable tuning. Receiver compatibility: Works with ELRS, CRSF, SBUS, IBUS, PPM and Spektrum DSMX receivers for flexible radio integration. Onboard logging and barometer: MicroSD black box support for flight data logging and BMP280 barometer for altitude sensing. Clean video power: Onboard car video filter for 5V supply to camera and video transmitter to reduce noise and improve video quality. Versatile BEC outputs: Dual BEC options, 5V 3A and 9V 3A, to power flight electronics and peripherals. Compact mounting: Flight controller size 36 x 36 mm, mounting holes 30.5 x 30.5 mm; weight 13 g. ESC size 41 x 39 x 5 mm, mounting holes 30.5 x 30.5 mm (after installing shock absorber ball, aperture is 3 mm); ESC weight 15 g. ESC specifications Firmware BLHeliS with EF8BB21 processor Input: 2S to 6S LiPo Continuous current: 50A or 65A options Burst current: 55A or 70A for 10 seconds Supports DShot150, DShot300, DShot600, Multishot, Oneshot, PWM Integrated current sensor Who this is for Freestyle pilots building 5 inch and 6 inch drones who need responsive control and clean integration. Longrange and cine builders using 7 to 10 inch frames who require reliable power handling and barometerbased altitude sensing. Large traversing or heavylift multirotors in 13 to 15 inch configurations that need higher continuous ESC current and robust ESC firmware. What you get F405 V2 flight controller (36 x 36 mm) 4in1 BLHeliS ESC (50A or 65A) sized for 30.5 x 30.5 mm mounting Support for common receiver protocols, Betaflight and INAV configuration, microSD logging, and advanced ESC protocols for precise motor control This stack offers a balanced combination of flight control features and ESC power for versatile drone builds, from agile freestyle frames to larger traversing airframes.