Jupiter Jack is an easy to use device that turns your car radio into a
hands fee speaker phone. It is easy to use. Simply plug Jupiter Jack
into your cell phone's headset jack and tune your car radio to 99.3 FM
and start talking hands free. It's that simple. Jupiter Jack features a
built in microphone that transmits your voice clearly while you hear
your caller's voice clearly through your car's speakers. Using a cell
phone without a hands free device may not be sage and is illegal in many
states. Now you will enjoy clear robust sound that only your car
speaker can provide allowing you to conveniently talk and drive at the
same time. Jupiter Jack works with any cell phone with an headphone
jack. Some phones may require an adapter, the most common of which are
included in the package.