Made by Universal Radio, this is a card you plug into your PC, and then load
software, and then plug an audio lead from the PC card to your radio, and get a
viewable output on your computer screen. Software included, along with manual.
You can read Morse code, SITOR, etc.
See the modes it supports on the Universal "Model Chart" (you'll need PDF
reader) at this URL:

http://www.universal-radio.com/catalog/decoders.html

then click on the model chart link. It compares the various models and the
modes they decode. The item I'm selling is the M-1000
Want $150 plus shipping. Paypal preferred.