I honestly can't imagine when I'd ever use it. But, since I have two radios with the capability, I thought I'd give it a try to see how it works. I tried it with a VX-6 and a FT-2900. I seem to have found a major flaw. It is supposed to automatically identify every ten minutes. It does attempt to do so, but, it seems like it transmits an unmodulated carrier when it is supposed to be ID'ing. Sure, it plays my callsign in morse over the speaker, but it's not transmitting the audio. The same thing happens on both radios. Does anyone else have any interest in this?