This is a splitter to use the car radio antenna for scanner use also. Has anyone tried it? If it does work it would be pretty stealth. I mainly listen in the 800 MHz range. The claim is that this will work wide band. Makes me wonder how it works with a fixed length car radio antenna. The old ones that were manually extended may be a better choice to use with it. http://www.rffun.com/catalog/scanants/4534.html