Firmware: Betaflight_3.3.0_Crazybee
MCU: STM32F303CCT6 (72MHZ, 256K FLASH)
Sensor: MPU-6000(SPI connection)
Power supply: 1S battery input (DC 3.5-4.35V)
Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
Built-in Flysky receiver with telemetry AFHDS/AFHDS-2A compatible
Built-in Betaflight OSD(SPI Controll)
Built-in Current meter (Max 14A,could be modified to 28A by replace resistor)
Built-in 5V 0.8A BEC with LC filter
Built-in voltage detection
BLHELI_S pass-through Ready
Heading LED Ready
Board size: 28.5 * 28.5MM
Board weight: 3.5 g

ESC parameters:
Power supply: 1S LiPo/LiPo HV (4.2v/4.35v)
Current: 5A continuous Max 6A (3 seconds)
Support BLHeliSuite programmable
Factory firmware: O_L_5_REV16_6.HEX
Motor connector: JST PH1.25 3pin
Signal Support: Dshot150/Dshot300/Dshot600/Oneshot125/Multishot/PWM

Receiver parameters:
SPI BUS receiver

Protocol: AFHDS and AFHDS-2A Switchable
Channels: 8ch(AFHDS) or 14ch(AFHDS-2A)
No ground interference ( Transmitting and receiving 1 m from the ground): 300m
Failsafe support