2 set of propellers: 2 clockwise and 2 counterclockwise propellerFolding Design, Quick Release AttachmentSmoother, Responsive and Quieter FlightHigher tension, easy to install more details
2 set of propellers: 2 clockwise and 2 counterclockwise propellerFolding Design, Quick Release AttachmentSmoother, Responsive and Quieter FlightHigher tension, easy to install