Features: 1. High Durability: Equipped with an 8-layer 3oz thickened copper skin for superior overcurrent protection and heat dissipation. 2. Advanced Processor: Utilizes the STM32F405RGT6 CPU for high-speed performance and efficiency during operations. 3. Enhanced Design: Features in-line connectors for hassle-free installation and vibration-reducing damping rings for stable flights. 4. Versatile Compatibility: Supports multiple protocols including PWM, Oneshot125, Multishot, Dshot150, Dshot300, and Dshot600. 5. Regenerative Braking: Improved throttle response and motor efficiency with integrated regenerative braking technology. Specifications: Item Name F4551 F405 Flight Controller Flight Controller size 36*36mm(30.5 mm-30.5mm installation hole spacing) Input Voltage 2S-8S Lipo Net Weight of Product 8.5g Firmware Version HAKRC F405V2 CPU STM32F405RGT6 IMU ICM42688 OSD AT7456E BALLOMETER Integration Black Box 16M BEC 5V/4A ; 12V/3A Serial 6 Receiver Comaptible with Frsky/Flysky/ TBS CRSF DSMX: DSM2 Receiver Item Name: 90A ESC Size: 56*52mm Net Weight of Product: 33g ESC Firmware: BLHeliSuite16714902A_Beta Input Voltage: 2S-8S Lipo Current Ratio: 100 Continuous Current: 90A Peak Current: 100A Protocol Support: PWM, Oneshot125锛孫neshot42, Multishot, Dshot150锛孌shot300锛孌shot600 Package Included: 1x F4551 F405 Flight Controller 1x 90A ESC