Mio shows Digiwalker C520 and Digiwalker C250 in the CES 2007. The Mio C520 has a 4.3-inch widescreen LCD display and it supports Bluetooth and “have split screen capability that allows for address lookup and route info while still navigating with the map”.
The Mio C250 is an entry-level GPS with pre-loaded map and a 3.5-inch touchscreen.