From what I can tell, its very popular in Brazil and South America in general. Their legal CB is 80 (85) channels from 26.965 MHz to 27.805 MHz (or 27.855 MHz, depending on where you look). 25w SSB 10w AM/FM maximum power to my understanding. I know that radios sold in Brazil generally follow the "export" frequency plan, that is, 25.615-28.305 MHz is the default frequency coverage, 6 bands of 40 channels each. Apparently 2 meter FM and the nearby frequencies are also very popular for truckers, etc. in Brazil...akin to high power MURS usage in the USA or the VHF LADD channels in Canada.