The DJI iOSD MARK II On Screen Display is specially designed for a DJI autopilot system and it should be used with multi-rotor aircraft that have either WooKong-M, Naza-M, Naza-M V2 or A2 flight controllers. It can transmit video and iOSD information in real-time, which will help you to obtain the aircraft status information during first-person view (FPV) flights. The iOSD MARK II can display multiple flight information specs including power voltage, flight velocity, height, distance from the home point, horizontal attitude, GPS satellite number and more. The iOSD will even superpose this data onto the video, so the iOSD data is clearly visible. This affords a more immersive and a more involved flight experience.