No, you do not need a license. Our products are compliant with various regulations and we have obtained the necessary certifications for Canada, USA, Europe, Australia, and elsewhere. Some countries and jurisdictions accept one or more of these certifications, most often CE (for Europe).
All RC4 rf products operate in an FCC-designated ISM (Industrial/Scientific/Medical) rf band. Our RC4Magic system uses the 2.4GHz band and can be configured to be compliant with regulations for either (1) USA and Canada, or (2) Europe, Japan, and numerous other countries worldwide. The most notable difference between these two configurations is rf output power. The European setting delivers low power; the North American setting delivers high power. Our newest DMXioR3 transceiver also provides 3 intermediate rf power levels.
If your show tours worldwide, RC4Magic is easily reconfigured to comply with varying regulations as you travel.