new board integrates Serial ExpressLRS 2.4G receiver. Compared with the original built-in SPI ELRS 2.4G receiver, it could flash the newest ELRS official firmware like V2.1 easily. Also, we updated the FC with high-quality BMI270 gyro, BB51 ESC hardware with Bluejay ESC firmware, and 8MB Betaflight Blackbox flash.

Bullet Point
Come with a Serial ExpressLRS 2.4G receiver, which can be updated via Wi-Fi or Betaflight serial passthrough. It is convenient for pilots to flash any version of ELRS RX firmware and especially can flash ExpressLRS V2.1 without updating flight controller firmware.

The SPI Frsky version board reserves an SBUS port and a UART port, which is available for the SBUS protocol receiver or other external receivers.

Built-in an 8MB flash memory chip dedicated to Blackbox logging. Its an extremely powerful tool for tuning and troubleshooting an FPV drone.

Particular design with a weight of 3.64g (Classical) and 2.96g (Light), reasonable layout, and easy to build. With a 26*26mm mounting hole size, it is fully compatible with the whoop frame in the current market.

Specification of FC
CPU: STM32F411CEU6 (100MHZ)
Six-Axis: BMI270
Built-in Receiver: Serial ExpressLRS 2.4G
Receiver antenna: Line antenna
FC Size: 30*30mm
Mounting Hole Size: 26*26mm
Firmware version: betaflight_4.3.0_BETAFPVF411 (STM32F411) (ELRS)
OSD: Built-in BetaFlight OSD
Blackbox: 8MB
Recommend VTX: >=200mW, like BETAFPV M03 350mW VTX or TBS Unify VTX
Power Cable: 55mm, with BT2.0 connector
Weight: 3.64g (with motor connectors), excluding power cable

Specification of ESC
Power supply: 1S
Current: 5A continuous and peak 6A (3 seconds)
ESC firmware: A_X_5_.HEX for Bluejay BB51 hardware
Signal Support: D-shot300, D-shot600

Included :
1 * F4 1S 5A AIO Brushless Flight Controller ELRS 2.4G
4 * M1.2x4mm Screws
4 * M1.4x5mm Screws
4 * Anti-vibration Rubber Dampers