Drake's UV-3 FM transceiver, manufactured in the US, covered the 144, 220, and 440 MHz bands. A different model was available for covering one, two, or three bands. A user could start with one or two and add more later by purchasing modular add-on RF modules factory installed. It was their first VHF/UHF transceiver on 220 MHz to use frequency synthesis instead of crystals for establishing the operating frequency. It also employed direct FM instead of the standard phase modulation thus having better audio. It was a model ahead of its time and the later compact multiband Kenwood TM-x41/x42 series that was sold in the late 1980s to mid 1990s, which could handle three band modules; the modules produced covered the 10,6,2,220,440 and 1200 MHz FM amateur bands).