Function: Flight controller board control multi-copter or fixed-wing flight Features: - Arduino Compatible - With one top-pin connector and two side-pin connectors - Includes 3-axis gyro accelerometer and magnetometer along with a high-performance barometer - On-board 4 MegaByte Dataflash chip for automatic datalogging - Optional off-board GPS - One of the first open source autopilot systems to use Invensense's 6 DoF Accelerometer/Gyro MPU-6000. - Barometric pressure sensor upgraded to MS5611-01BA03 from Measurement Specialties. - Atmel's ATMEGA2560 and ATMEGA32U-2 chips for processing and USB functions respectively.