2.4 GHz: 13-cm UHF band aircraft only China reserved frequency bands 1.4 GHz: general use 2.4 GHz: 13-cm UHF band general use 5.8 GHz: general use 433 MHz: for amateur radio licensees only Australian reserved frequency bands 36 MHz: aircraft and water-craft (odd channels for aircraft only) 29 MHz: general use 27 MHz: light electric aircraft, general use 2.400-2.485 GHz: 13-cm UHF band Spread Spectrum band for general use (ACMA references available at ) New Zealand reserved frequency bands 35 MHz: aircraft only 40 MHz: aircraft only 27 MHz: general use 29 MHz: general use 36 MHz: general use 72 MHz: general use (US 72 MHz "even-numbered" channels 12 through 56, at 40 kHz spacing) 2.400-2.4835 GHz: 13-cm UHF band The frequencies are permitted under legislation, provided equipment meets the appropriate standards, bears the New Zealand supplier's Supplier Code Number and has the correct compliance documentation (Radio Spectrum Management information available on the RSM website) Detailed information, including cautions for transmitting on some of the 'general use' frequencies, can be found on the NZMAA website. Amateur radio license reserved frequency bands 50 and 53 MHz in the US and Canada (American amateurs allowed up to one watt [30 dBm] of output power) 433–434 MHz Formerly used low-UHF band in Germany until the end of 2008, but is still permitted in Switzerland; and is also usable within both the US and Canada, most often implemented nowadays in North America with spread spectrum RF hardware (as on 2.4 GHz). Channels and frequency control Traditionally (since 1967) most RC aircraft in the United States utilized a 72 MHz frequency band for communication six of these were actually on the 72 MHz band at 80 kHz separation from each other, with one additional isolated frequency at 75.640 MHz. These remained legal to use until the 1983 FCC reform that introduced "narrowband" RC frequencies at 40 kHz separation from 1983 to 1991, and finally at 20 kHz separation from 1991 onwards, to the present day with fifty frequencies on 72 MHz solely for flying models. The 75 MHz band became usable only for ground-based RC modeling (cars, boats, etc.) in the same timeframe, with the transition also occurring through to 1991, having 30 frequencies available at the same 20 kHz channel separation. Canadian modelers today flying on VHF-band RC gear use the same 72 and 75 MHz frequencies as American hobbyists do, for the same