On which frequency may I transmit without a license?

There are several ways to carry out radio operations on different frequencies and with approved devices, even without purchasing an amateur radio license. Primarily worth mentioning are: CB radio (26.565 – 27.405 MHz); Freenet (149.0250 – 149.1125 MHz); PMR446 (446.00625 - 446.196875 MHz). It is important to check current regional regulations before use as regulations are subject to change and vary internationally.