What happens next?

How to use a uhf radio
Choose a radio tuned to uhf frequencies.
Uhf is a large band from 300 mhz to 3 ghz, but specific frequencies in it are available for public use, depending on where you live. Check the labeling on the packaging before purchase.
Uhf devices, including handheld radios, will automatically be set to use this frequency. Larger radios may be able to reach frequencies outside the uhf band.