-XR Helicopter Flight Controller Firmware: MCU: Gyro (IMU):Rotorflight 22;STM32F722RET6;ICM42688P Flash Memory:256Mb (W25NO2KVZEIR);Baroneter;SPL06-001 UART (5):S.BUS(UARTI), TELEM(UART2),PORT-A[UART4),PORT-B(UART6, PORT-C(UART3) Servo (4):SI, S2, S3, TAIL RPM Sensor (1):(From ESC Frequency Sersor) AUX: Ext vohoge input (): 3.6-70v Receiver Support:CRSF, ELRS, GHOST, S.BUS, SUMD, IBUS, XBUS, EXBUS, PPM, MSP Voltoge Supply (DC):5-16V A-B-C Power Output:SV 1.5A Telemetry:S.BUS, , S.Port, MSP, EDGETX, ELRS ESC:PWM, Oneshot, Mutishot, Dshot Support Tail ESC:760us /1520us Servo Support Tail Motor MCU:Yes Internal Receiver:RP4TD-M ExpressL. 2.4GHz Mini True Diversity Receiver ESP32 Type:ISM Chip:Sx1281 x2 Antenna:65mm 2.4GHz Wire Anterna x2 Frequency Range:2.4GHz Max Refresh Rate:500Hz/F1000Hz Telemetry Power:Max 2x10mW FW Torget: RP4TD-M 2400 RX Bus interfoce:CRSF Colour:Grey Material:Aluminum Alloy Package Contents: 1 set x Helicopter Flight Controller 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.