The retractable landing gear is designed for the S800 frame in order to provide a better perspective in aerial-filming / photography work. By using a 2-position switch channel of the R/C transmitter, you can control the landing gear to retract remotely. The retractable landing gear will not block the view of the camera lens, making smooth shooting in all directions possible.

Product Link:
http://www.dji-innovations.com/products/s800-retractable-landing-skid/overview/