Notes: R1(RX1) Pad is used for IBUS/DSM2/DSMX signal input IR1(IRX1) Pad is used for SBUS signal input (Already inverted) R1 and IR1 Cannot be used simultaneously Flight controller (Frsky SPI RX version) CRAZYBEE F4 Lite Frsky version Firmware target: CrazybeeF4FR (Flysky SPI RX version) CRAZYBEE F4 Lite Flysky version Firmware target: CrazybeeF4FS MCU:STM32F411CEU6 (100MHZ, 512K FLASH) Sensor: MPU-6000(SPI connection) Board size: 28.5 * 28.5MM Power supply: 1S battery input (DC 2.9V-4.35V) Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready Built-in Betaflight OSD(SPI Control) Built-in 5.8G VTX Built-in SPI Frsky/Flysky receiver Built-in 5V 1A BEC Built-in voltage detection Onboard 4in1 ESC MCU upgraded to EFM8BB21 Power supply: 1S LiPo/LiPo HV Current: 5A continuous peak 6A (3 seconds) Support BLHeliSuite programmable Factory firmware: O_H_5_REV16_7.HEX Default protocol: DSHOT600 Onboard Frsky SPI D8 receiver Version SPI BUS receiver Frsky D8 compatible Compatible Non EU transmitter D8 model Channels: 8ch Failsafe support No ground interference ( Transmitter and receiver 1 m from the ground): 100m~200m Onboard Flysky SPI receiver Version SPI BUS receiver Protocol: AFHDS and AFHDS-2A Switchable Channels: 8ch(AFHDS) or 14ch(AFHDS-2A) No ground interference ( Transmitter and receiver 1 m from the ground): 100~200m Failsafe support Onboard 5.8g VTX Output power: 25mw Frequency: 40CH Input voltage: 3.3V 5.5V Current consumption: 300mA(type) Frequency: 5.8GHz 5bands 40 channels With Race band Smartaudio ready