This is a custom flight controller based around a STM32F103C8T6. It contains a BMP280 to measure the altitude of a drone, an ICM-42688-P that contains an accelerometer and gyroscope for motion control. The input voltage should be 12V and is set up to work with a LiPo battery.

The TDK InvenSense ICM-20948 is the world's lowest power 9-axis MotionTracking™ device, optimized for Smartphones, Tablets, Wearable Sensors, and IoT applications. This highly integrated component features a 3-axis gyroscope, 3-axis accelerometer, and 3-axis compass, all housed within a compact 3 mm x 3 mm x 1 mm 24-pin QFN package. The ICM-20948 includes an onboard Digital Motion Processor™ (DMP™) that offloads motion processing algorithms from the host processor, thereby enhancing overall system power performance. It supports both I2C and high-speed SPI communication interfaces and operates within a voltage range of 1.71V to 3.6V. The device is fully compliant with Google's latest Android release and supports EIS FSYNC. Additional features include on-chip 16-bit ADCs, programmable digital filters, an embedded temperature sensor, and programmable interrupts, making it an ideal choice for applications requiring precise motion tracking and low power consumption.