The Happymodel CrazyBee F4 Lite Flight Controller brings lots of power in a small package. This 4-in-1 FC comes with an integrated receiver (FrSky), ESC, and an onboard 5.8GHz VTX!NotesR1(RX1) Pad is used for IBUS/DSM2/DSMX signal inputIR1(IRX1) Pad is used for SBUS signal input (Already inverted)R1 and IR1 Cannot be used simultaneouslySpecificationsFC(Frsky SPI RX version) CRAZYBEE F4 Lite Frsky version Firmware target: CrazybeeF4FRMCU:STM32F411CEU6 (100MHZ, 512K FLASH)Sensor: MPU-6000(SPI conn