Betaflight Devs are adding new targets (CrazyBeeF4FRPro/CrazyBeeF4FSPro/CrazyBeeF4DXPro) to BF code. CrazyBee F4 Pro is an updated version of CrazyBee F3 Pro , with updated MCU from STM32F303 to STM32F411 and also added an extra uart, now it has two uarts. Board will have uninverted and inverted RX1 inputs. It will also have led and buzzer support! It will be added in the Betaflight 3.5.5.
CrazyBee F4 Pro boards will debut with Trashcan 2S brushless whoop and also new version of Mobula 7.
EDIT 2019-01-28: There is an updated version Crazybee F4 PRO V2.0 Flight Controller, supporting 1S-3S battery input. This FC will be included with the Mobula7 HD.
Available @ https://www.banggood.com/Eachine-Crazybee-F4-PRO-Flight-Controller-compatible-Frsky-Flysky-DSM2DSMX-Receiver-for-TRASHCAN-2S-Whoop-FPV-Racing-Drone-p-1413369.html