Kevin it would be the same as the M5/M10. If you don't have a Spektrum Satellite receiver you would need to purchase one for the M15.
Kevin, If you do not have a Spektrum Remote receiver, you can purchase one directly from Spektrum here.. https://www.spektrumrc.com/Products/Default.aspx?ProdID=SPM9645 After you have acquired a the receiver, please visit the Freefly Knowledge Base for instructions on how to bind the Spektrum to the MoVI. https://freeflysystems.zendesk.com/hc/en-us/sections/200636145-Spektrum