Hitec Laser 6 is typical four-channel-function-control RC transmitter. Antenna mast is collapsed to short section, to which channel-number flag is attached. Shortening antenna greatly reduces transmitted power, making transmitter safer to operate for tests in shop and permitting convenient range check outdoors. If you can get receiver to operate to roughly 50-100 feet from transmitter while antenna is retracted, you will have out-of-sight range once model is in air and antenna is fully extended.