Rugged Radio Rugged Business Band RDM-DB Mobile Radio - Digital and Analog - UHF VHFSKU: RDM DB The powerful RDM DB digital analog mobile radio delivers superior audio quality and crystal clear communication! Easily switch the radio mode to analog to provide connectivity to friends not using a digital radio signal. The difference between signal quality in analog vs digital is huge. While both an analog & digital radio will transmit over the same distance, the digital radio will remain loud and clear all the way to the end of the