RF Viewer -- 1.8 GHz RF Spectrum Analyzer Plus Touchstone-Pro Software Includes Software: Touchstone-Pro from Nuts About Nets Affordable: RF Viewer is a software plus hardware package that includes a wireless, USB dongle and Touchstone-Pro software. Wide band coverage includes popular sub-1Ghz ISM bands, with maximum frequency reaching to 1766 MHz. Portable: Light-weight and small in size, connects to USB port on laptop machines running a Microsoft Windows operating system. Data Interface: USB cable connects to Windows PC running sophisticated data acquisition and analysis software -- Touchstone-Pro.