US shipment The RF Viewer spectrum analyzer is a very unique device. The wireless USB dongle combined with the Touchstone-Pro software provide a powerful RF diagnostic tool unmatched in price and performance. An excellent review of the product appeared in a recent edition of The Spectrum Monitor publication and appears here. Regular contributor to TSM, Mario Filippi N2HUN, takes this spectrum analyzer dongle to the VHF and UHF bands, looking for signals. He notes, "Unquestionably, this is one of the most useful pieces of radio gear I have encountered as a hobbyist in many years!" RF spectrum analyzer spans a frequency range of 24 MHz up to 1766 MHz, which makes it ideal for use in a broad array of RF-related applications.