Motorola XPR6550 UHF 403-470mhz MotoTRBO portable radio. Motorola XPR6550. (1) Motorola XPR6550 UHF radio. Motorola XPR6550 UHF. UHF 403-470mhz. (1) UHF antenna. • Frequency - UHF. These have been cleared out to original factory settings and updated to the latest R01.12.17 firmware.