| Pin | Function |
| G | Ground |
| 2 | PWM Output (Motor 2) |
| RX | RX Input (PPM、S.BUS、 SUMD / 3.3-5v / GND) |
| 5v | Receiver Voltage (3.3v-5v) |
| BZ+ | Buzzer + |
| BZ- | Buzzer - |
| 4 | PWM Output (Motor 4) |
| 1 | PWM Output (Motor 1) |
| T1/T2/R2 | UART1 TX、 UART2 TX、 UART2 RX |
| 5v | 5v output |
| 3 | PWM Output (Motor 3) |
| Pin | Function |
| G | Ground |
| T3/R3/R1 | UART3 TX、 UART3 RX、 UART1 RX |
| 5v | 5v Output |
| CUR | Current Sensor |
| BAT | Input voltage 6-26v (2-6S lipo) |
| RSSI | RSSI |
| LED | Digital LED Output |
| PPM/SRX | Bridge PPM for PPM. SRX for SBUS、 SUMD、 other serial connections |