: It resolves minor software conflicts that occasionally caused "ILLEGAL" error messages on radio displays after programming with older versions. Hardware Compatibility
The is the final software release produced for the Astro Spectra mobile radio series. While it is an older legacy application, it is considered "better" than previous versions because it offers the most stable and comprehensive feature support available for these radios before they reached end-of-life. Key Features & Improvements astro spectra cps 503 rvn4183 better