Reference has been made about Mode One radios not being available here in the U.S. Any radio available here in the US can be switched to any of the four modes. It's a simple matter to convert a Mode Two transmitter to Mode One: swap the springs on the Mode Two elevator with the ratchet on the Mode Two throttle. If the conversion takes more then this, send the transmitter to the manufacturer/distributor/repair shop and have them do the conversion for you. I have had all my Airtronics radios converted to Mode One and all it has ever cost me is the shipping cost to where I sent it for the conversion.