- [Mandatory] LED x 2, status & mode
- [Nice2Have] LED x 1, Power
- [Mandatory] Button x 1, software mode switch
- [Nice2Have] Button x 1, reset
- [Mandatory] external RF antenna (2.4/5.8G WiFi & BT)
- [Nice2Have] MMCX for external RF antenna
- [Nice2Have] Support PCB-antenna and extenal-antenna with selective 0 ohm resistance
- [Mandatory] USB type C for PC connection (firmware upgrade/debug)
- [Mandatory] 6pin connector for power and communication (7-24V, GND, OSD_Rx, OSD_Tx, MSP_Rx, MSP_Tx)
- [Nice2Have] 4pin connector for ELRS receiver integration
- [Option] micro-SD CF for extended storage
- [Option] camera interface