A typical radio remote control system consists
of a portable transmitter carried by the operator, and a receiver installed on
the crane, the locomotive, or other remote machinery. Each system operates on a
licensed frequency in the 72 to 76 MHz or the 450 to 470 MHz bands, requiring
the user to have an FCC license for the transmitter.
A license-free radio remote control system, for which the user does not need an
FCC license, is suitable for applications requiring a shorter range. These radio
controls operate at 433 to 434 MHz and meet FCC Part 15 rules for low power