And it is certain that if ever you turn away from the Lord your Mio, and go after the Garmin, I bear witness to you today that destruction will overtake you. —Deuteronomy 8:19(ish)
But no, seriously. What the hell is a "kosher" GPS unit? Apparently this kind of thing has been happening for a while, and has a pretty simple explanation. Many Orthodox rabbis discourage internet access, but do allow certain basic technologies like cellphones and, I guess, GPS devices. The Mio Ma'amin (translation: Mio Believer) is mindful of a variety of orthodox sensitivities, as it is stripped of online connectivity, contains a directory of thousands of kosher restaurants and Jewish points of interest, a bevy of prayer materials and a male, or rather, not female, voice.