In Japan the Kei-cars, small vehicles with less than 660cc engines, are very popular. Some of their advantages include a compact size (easy to park) and a low fuel consumption (small engine). As a result the various car manufacturers do sell a lot of those and each one proposes a couple versions in its line up.
As the market is booming, aftermarket products are now available for this type of cars, like Kenwood with a 2 Din car radio featuring a CD player and built in GPS (3.5 inches screen). The audio part supports MP3, AAC and WMA codecs, an iPod can be plugged in to this MNA-350 and the SD port can be used to upgrade the GPS.