There are a lot of technical details we could get into, but long story short - UHF is a “better” signal. Ultra High Frequencies (UHF) penetrate obstructions such as buildings, wood, steel and concrete better than Very High Frequencies (VHF). However, UHF signals do not travel as far as VHF signals do. VHF also curve around the earth better for long distance, outdoor and hilly terrain. We recommend UHF for Closed Course racing and Business solutions. All Desert Racing should use VHF.The VHF band range is 150Mhz to 174Mhz. UHF is 400Mhz to 512Mhz. VHF and UHF radios cannot be programmed to talk to each other. Desert teams can use VHF radios for desert and short course, but the ideal scenario would be to have UHF radios for short course and a separate set of VHF radios for the desert.