... 6.0 ,electronic map ,different languages ,etc M504T car GPS navigation device1. 5.0 inch TFT touch screen, solution: 480 ... external SD card6. Types of operation methods: touch screen7. Functions: Navigation, MP3, MP4, JPG picture,E-Book8. Numbers of signal ... Camera function13.support different map:Route66, I-GO, Ndrive,ect14. support 19 languages 15. with outside speakera car GPS navigation device