Naza for multi-motors is an autopilot system designed for serious multi-rotor enthusiasts providing excellent self-leveling and altitude holding, which completely takes the stress out of flying RC multi-rotors for both professional and hobby applications. Naza can be installed in a variety of models from quad-rotor to hexa-rotor.

Product Link:
http://www.dji-innovations.com/products/naza-multi-rotor/overview/