: It resolves minor software conflicts that occasionally caused "ILLEGAL" error messages on radio displays after programming with older versions. Hardware Compatibility
: It is the standard for "1 MEG" ASTRO Spectra units, though it does support the "ASTRO Spectra Plus" (which requires the ASTRO 25 Mobile CPS / RVN4185). RadioReference Key Technical Specifications Kit Number RVN4183 (Mobile version) Last Version Supported OS astro spectra cps 503 rvn4183 better
She typed in her brother’s call sign: RVN-4183. : It resolves minor software conflicts that occasionally