How to make RT21 UHF work with RT21 FRS radio?
RT21 has four versions: FRS, UHF, FRS Plus battery 3000mah, MURS, so it’s very easy to choose the error version. If you bought RT21 FRS radio before, but the new order you mistake to buy RT21 UHF radio, how to make RT21 UHF work with RT21 FRS radio? Please follow me to reprogramme the RT21 UHF radio