Why do two way radios have VHF and UHF options on purhcase?

VHF is 30 MHz to 300 MHz. UHF is 300 MHz to 3000MHZ. Microwave is generally considered to start at 1000 MHz but the 1000 MHz to 3000 MHz part is still technically UHF.

For some reason the frequency bands were divided at 3. See the link below for a complete listing. Most radios don't do both bands.

You buy either a VHF radio or a UHF radio. There are some radios, mostly ham radios, with both bands, but you have to make sure the radio has this ability before you purchase it. Among other things, there are differences in coverage and building penetration between the bands.

VHF will cover a greater distance than UHF with the same power. UHF will penetrate a building better than VHF because it has a shorter wavelength and will get through better because of this. Sometimes one band is used because there aren't any open frequency in the other band.

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