Look at the docs for the radio on the plane and then acquire a remote control that is compatible with that radio. Or, if you don't even have a radio, buy a rem

Look at the docs for the radio on the plane and then acquire a remote control that is compatible with that radio. Or, if you don't even have a radio, buy a remote control and radio, read the manuals, install the radio (and battery), connect the servos, check that it works.