Which radio frequency is best for long distance?

VHF, since it tends to bend with the curvature of the earth more than UHF, is ideal for outdoor applications where distance is the primary user need. However, a big disadvantage of VHF is that it does not work well indoors as it will not penetrate walls or reinforced concrete as well as UHF .

VHF offers a much larger broadcast range, which is preferred in some industries. UHF radio signals are used in many facets of life including satellite communication, GPS, Wi-Fi, Bluetooth, walkie-talkies, cordless phones, cell phones, and television broadcasting.

The quick answer is: choose VHF if you plan to only use the radios outdoors and in an area that is relatively free of obstructions, such as buildings . If you plan on using the radio indoors, both indoors and out, or outdoors but around buildings, choose UHF.

VHF radios are suited for long distances in and outdoor use. UHF radios operate at a higher frequency . This makes them ideal for wireless communications that need to penetrate through buildings, walls, or concrete. UHF radios are suited for indoor communication solutions, where obstacles are easily penetrable.