A lot of people would have come across the late night commercial of a product called Jupiter Jack and wondered whether it was worth investing on. This product can be quite a help to a lot of people though there will always be those who may prefer to invest some extra money and go in for a blue-tooth headset. Basically, Jupiter Jack works by transferring your phone call to your car radio so that you can hear the person on the other end over your radio. You just have to plug in your Jupiter Jack and then choose the right radio frequency on which you can hear your phone conversation. It is extremely simple and does not require any technical skill. In spite of the ease with which you can use Jupiter Jack, there is an inherent problem which is that your telephone call can be heard over the radio and that translates to no privacy. So if someone else is with you in your car, you may not feel like talking on the phone with Jupiter Jack in place. So if you wish to have a private conversation, this system won’t be of much help.