It was a very limited implementation of wireless USB. You could only plug in two USB devices and only particular devices worked, if I remember correctly. My s

It was a very limited implementation of wireless USB. You could only plug in two USB devices and only particular devices worked, if I remember correctly. My suspicion is that the reason it went off the market was because it used UWB and the government put a lot of restrictions on its use so that it couldn't be repurposed for use in military applications. It's very difficult to intercept an encrypted UWB communication link, or to even know it is present. It essentially just looks like a slight raising of the noise floor across a wide band of frequencies. UWB was required to get the necessary bandwidth, doing USB across WiFi would probably cause timing errors in devices because it would be so slow (at least using 802.11b which was in wide use at the time). I think hardware makers really hated the idea also because a successful wireless USB system would allow sharing hardware between many computers instead of buying a device per computer (consumer NAS was expensive back then). It was also very expensive, about $400 I think, which was a lot at the time for something that had limited functionality. I remember thinking about buying one and decided it wasn't worth it.