The cube contains the Pixhawk 2.1 autopilot without carrier board. It can be used with a carrier of your design, or with any of the following: Hex Technology standard carrier board, The Kore quadrotor carrier, or with the Hex Technology mini carrier board. It features the following: An STM32F427 Rev 3 flight management unit, An STM32F100 I/O processor with pass through, 1x Fixed 10 Axis IMU (MPU9250 with MS5611 Barometer), 2x Vibration Isolated and heat controlled IMUs (MPU9250, L3GD20 3 Axis Gyro, and MS5611 Barometer). All connections are via an 80 pin DF17 connector on the base.