Relay Station Mode is unavailable in countries or regions without 5GHz frequency support, such as Japan, Russia, and Kazakhstan. Only the Base Station and Rover Station modes are supported in the aformentioned countries. In Relay Station Mode, if a previously paired drone remote controller and relay station are brought to Japan for use, the remote controller and drone will not be able to connect with the relay station. Additionally, if you attempt to pair the remote controller with the relay station in Japan, the pairing will fail.