You can charge， remove card and use all functions while the tracker is mounted in the holder. It takes 2 sec' to put it in or take it out of the holder， simply push it in or out using a little force.it is very strong and holds the tracker very tight so it can't fall while you're flying.Installation:Simply turn your phantom over its head and open the two screw that are close to the center of the phantom Place the holder in place and put the crews back in.Package includes:1xGPS Mount1xScrew DriversSome Screws