The default configuration from factory is Frsky D16 mode (FRSKY_X). Built in Frsky receiver is compatible with Taranis, Taranis Plus, X9E, Horus X12S, XJT Modules. In Betaflight Configuration, it should be setted as FRSKY_D receiver (aka Frsky D8 mode) or FRSKY_X receiver (aka Frsky D16 mode) in SPI RX mode.
This is a SPI Frsky receiver. Binding easier than before, no need to click the bind button when power on. Manual: https://betafpv.freshdesk.com/support/solutions/articles/27000021366-how-to-bind-your-radio-transmitter-brushed-fc-board
The flight controller board comes pre-flashed with Betaflight firmware, and pre-soldered 55mm power cable pigtail with JST-PH 2.0 connector, AKA PowerWhoop connector. Designed to work with current Tiny Whoop or Blade Inductrix setups
F411 Processor can reach to 100MHz, much faster than the F3 Flight Controller with 72Mhz. Integrated with Frsky receiver only. Upgraded to 30A Lower Resistance MOSFET, Firmware version: betaflight_matekf411rx_3.4.0. Built-in BetaFlight OSD (STM32 controls OSD chip over SPI in DMA mode). Support Smart Audio.
Some basic guidance and typical FAQ, please check it here : https://betafpv.freshdesk.com/support/solutions