It uses an STM32G474 processor, ICM42688-P gyroscope, integrated OSD, built-in 8MB black box, and built-in 5V/1.5A BEC. It features a built-in ELRS 2.4G receiver and a built-in VTX 5.8G 400MW video transmission module, supporting 1-2S 12A brushless ESCs (four channels). This circuit board does not have a barometer module. If you encounter difficulties starting the motor when using 1S power, please adjust the starting power value to an appropriate level to successful startup. The video transmission on this AIO does not have the Low Power Disarm function enabled by default (this means: when unlocked, the video transmission is at maximum power; when locked, it's at minimum power, which can reduce the PCB temperature during tuning). If you don't use the built-in ELRS, it also supports external SBUS receivers. Main Control Chip: STM32G474CEU6 (170MHz, 512K) Gyroscope: -42688-P Barometer: None OSD Chip: AT7456E Black Box: 8MB LED Programming: Supported Buzzer: Supported Input Voltage: 1-2S Interface: Supported BEC: 5V/1.5A Camera Input: Supported Serial Control Ports: 4 (UART3 for internal ELRS receiver, UART2 for internal 5.8G VTX, UART1, UART4) Flight Controller Firmware: Betaflight4.2.2 JHEG474.HEX ESC Current: 12A*4 Current Sensor: Yes Firmware: Z-H-30.HEX (default 48K) Default ESC Driver Protocol: DSHOT300 Receiver Type: ELRS Receiver Frequency: 2.4G Receiver Signal Protocol: CRSF Receiver Firmware: .rx_2400.lite.3.2.0 WIFI ELRS Firmware Update Support: Supported Video Transmitter Frequency: 5.8G Video Transmitter Channels: 48CH Video Transmitter Power: 25mw, 100mw, 200mw, 300mw, 400MW Video Transmitter OSD Parameter Adjustment Protocol: Smart Audio Mounting Hole and Vibrations Damping Ball Hole Conversion: M3, 25.5*25.5MM Maximum Dimensions: 30*30MM (The product printed words depending on the batch, but this does not affect use) Color: Black Material: PCB Package Contents: 1*G474ELVTX AIO Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.