Readytosky Pixhawk PX4 Flight Controller Pixhawk 2.4.8 32 Bit Flight Control Board+Safety Switch+Buzzer+I2C Splitter Expand ModuPixhawk PX4 Autopilot PIX 2. 4. 8 32 Bit Flight Controller Features: 1. The advanced 32 bit ARM CortexM4 high performance processors, can run NuttX RTOS real time operating system; 2. 14 PWM servo output; 3. Bus interface (UART, I2C, SPI, CAN); 4. The integrated backup power and backup controller fails, the primary controller fails over to the backup control is safe; 5. Provide automatic and manual modes; 6. Provide redundant power input and failover;