Selling it to fund my LS1 swap.
This is the 10hz 'hi definition' system. It requires a blue tooth capable smart phone to be in the car with you. It comes with the magnetic base (was an add on to the base price) so you can mount it to the roof of the car to get the best satellite signal.
Price $250, and includes the magnetic roof case which was an additional $30 IIRC.