The extreme low moment of inertia makes this little quad one of the best flying quads in it's weight class.
Due to the lighter weight of the O4pro (compared to the O3) we made the 6mm "bando" arms the new standard. We also went from countersunk to low-profile torx-screws for the arms to remove stress from the top-plate. All carbon parts are compatible with the first version.
Mount the props (props-out), bind your Googles and TX, plug a pack (we recommend GNBs 4S 650mAh HV packs) and rip it.
Hell - we will even set your rates and your bind phrase if you let us know.
