Note: Please note if you use the F4 2-3S 20A AIO flight controller, the serial port of the SBUS receiver is UART5. Item: F4 2-3S 20A AIO V1 Brsushless Flight Controller Weight: 5.58g (without motor connectors and power cable),5.92g (with motor connectors) Mounting Hole Size: 26mm x 26mm CPU*: STM32F405RGT6 (168MHz) Six-Axis: ICM42688P (SPI connection) RX: Serial ELRS 2.4G Receiver RX firmware version: BETAFPV AIO 2400 RX ELRS V2.5.2 Antenna: Enameled wire Blackbox Memory: 16MB Sensor: Barometer(BMP280), Voltage&Current 5V BEC*: 5V 3A@8V supply 9V BEC*: 9V 2A@8V supply USB Port: SH1.0 4-Pin Built-in ESC with 20A continuous and peak 25A current ESC input voltage: 2-3S FC firmfware version: Betaflight_4.4.1_BETAFPVF405 ESC firmware: C_X_70_48_V0.19.2.hex for BB51 Bluejay hardware Signal support: D-shot300, D-shot600 Package 1 * F4 2-3S 20A AIO FC V1 4 * M2*10 Machine Screw 4 * M2*10 Nylon Screw 4 * M2 Nuts 4 * Shock Absorbing Ball 4 * JST1.25mm Angle Socket 4 * JST1.25mm Straight Socket 1 * SH1.0 4Pin Adapter Cable 1 * Type-C to SH1.0 Adapter 1 * XT30 Power Cord 1 * Filter Capacitor 1 * 30mm Double-head VTX connector wire 1 * 60mm Single-head VTX connector wire