upgrade to CD-Changer Navigation system.

Now in japan, most of car navigation systems has hard dsik drive for navigation map data, static traffic jam information. And brand-new systems had hard disk music player function likes iPod, and DVD player function with 5.1 channel theater sound. And brand-new navigation systems is very expensive.(High-end model's price is over 2,000USD)

But I do not need such a rich functions. I need 1) where am I? 2) where is my goal. I only need minimal functions. Then I bought used CD Cahnger Navigation at net auction(the price is only 80USD).

But CD's data transfer speed is very slow compared with hard disk drive. This make route search function very slow. That point is not addmitted.

By the way, now ther are simple some navigation systems with 4or5 inchs small display and solid memory(i.e. SD etc.). But these do not have a video output. That is why I do not buy new one.