If there is no frequency selection and only a limited power selection is available under "Menu" -> "General", your TBS CROSSFIRE is locked. TBS CROSSFIRE is fully legal to use for countries following CE/ETSI, FCC or C-Tick rules. When you power up the transmitter you can see next to the version number to which regulation the TBS CROSSFIRE is locked.
Regular CROSSFIRE TX:
In case you want to un-lock your TBS CROSSFIRE you have to enter the Konami Code.
Power up your TBS Crossfire wait until you see the main screen then do the Joystick combination "up, up, down, down, left, right, left, right, enter enter". Got to the "Menu" -> "General" and you should see a new selection called "Region". Select "Open" to unlock your TBS CROSSFIRE.
CROSSFIRE MICRO TX:
To unlock the CROSSFIRE MICRO TX power up TX and RX. Make sure the system is bound to a receiver and the LED on the TX is green. Press the bind button more than 10 times in a row. Got to the "Menu" -> "General" and you should see a new selection called "Region". Select "Open" to unlock your TBS CROSSFIRE
In case you want to lock your TBS CROSSFIRE according to your country rules, go to "Menu" -> "General" and select the correct regulation for your country. Confirm the selection and your TBS Crossfire will be locked.
TANGO 2 / PRO MICRO TX
Press and hold the EXIT & MENU buttons for 6 seconds or more. (*requires version 3.7 or newer)