Let's break down the key features mentioned:

F4 Processor: The flight controller is equipped with an F4 microcontroller, which is part of the STM32F4 series. F4 processors are commonly used in flight controllers due to their processing power and capabilities for handling various flight control tasks.

Built-in OSD (On-Screen Display): The OSD feature allows for real-time display of flight data on the video feed sent to the FPV (First Person View) goggles or display. This data may include information like battery voltage, flight mode, and more.

BEC (Battery Eliminator Circuit): The flight controller has a built-in BEC, providing regulated power to other electronic components on the drone, such as receivers, cameras, or LEDs. The BEC typically outputs 5V for powering these peripherals.