This is the new APM 2.8 flight controller. The sensors are exactly the same as the APM 2.6 flight controller however this has the option to use the built in compass, or external compass via a jumper. This makes the APM 2.8 ideal for use with multicopters and rovers. The APM 2.8 is a complete open source autopilot system and the bestselling technology that won the prestigious Outback Challenge UAV competition. It allows the user to turn any fixed, rotary wing or multirotor vehicle (even cars and boats) into a fully autonomous vehicle; capable of performing programmed GPS missions with waypoints.