R600 GPS 4.3IN LCD BT MP3 To cater to users who require a sleek, compact and powerful Personal Navigation Device (PND), ASUS has announced the release of ASUS R600 Auto Light Sensor PND. With an intuitive built-in auto light sensor that automatically adjusts the LCD backlight, BlueTooth handsfree, and the ability to transform into a portable multimedia entertainment center, the R600 is a versatile and fashionable-looking piece of hardware for enhanced navigational needs.