The classical F4 Brushed Flight Controller comes back with new changes and particular shapes. Build-in CC2500 chip, the default protocol is configured to Frsky D8 out of the factory and can be adjusted to Frsky D16 FCC, Frsky D16 LBT, or Futaba. Besides, the power cable adopts BT2.0 connector instead of PH2.0, which improves the performance and is compatible with BETAFPV BT2.0 series batteries.