The description doesn't really make clear the BIG advantage of this cable...
It connects direct from the car-charger socket directly to the iAudio player - with NO NEED FOR A SUB-PACK.
The one drawback of the Cowon iAudio X5 music players is the reliance on the sub-pack (the small adapter that connects to the bottom of the player) or a docking station in order to charge the player.
In a car this is annoying. THIS CHARGER SOLVES THIS PROBLEM.
The other problem is that even using a sub-pack, if you try to charge via USB (I have multiple car charger-to-USB cables for charging phone etc) then you cannot use the player while charging (the player assumes it is connected to a PC, so enters USB connect mode!).
Again, this charger / cable SOLVES THIS PROBLEM.
I cannot recommend it enough. There is now no chance of my iAudio player ever running down in the car (which is was starting to do on longer journeys due to the internal battery approaching end of optimum life).