wbmccarty

The manual is available on the Support section of the Radtel website. It is very brief. The radio does not appear to be FCC Part 95E compliant or Part 95E certified. Its stated output power (10W) exceeds the maximum allowable for portable GMRS devices (5W). The higher power seems unlikely to provide greater range but would certainly drain the battery more quickly than the legal power. The RT-493 also supports frequencies that are not part of the FCC-allocated GMRS spectrum, though Radtel asserts they are GMRS frequencies. Specifically, it supports 44 of the 30 Simplex channels [sic] authorized by the FCC. I checked Part 95E as of the date of this posting, April 6, 2025. Personally, I would avoid the RT-493, especially if communicating with devices other than the RT-493 itself, since you may inadvertently choose a non-GMRS channel. Moreover, I strive to operate in full compliance with FCC rules and regulations.

I just purchased a GM-30 Plus. The instructions shown above by WRYZ926 appear in Section 6.3 "Dual Watch" of the GM-30 Plus manual. [Note that "single" is sometimes misspelled as "singal."] Nevertheless, when I disable Dual Watch (confirmed by absence of the "D" icon on the LCD), I find neither a Single Mode nor Sync menu item. Either the manual or the radio firmware (or both) appears to be in error on this point.