M504t car GPS system support bluetooth,AVin , window ce 6.0 ,electronic map ,different languages ,etc M504T car GPS navigation device1. ... Storage: internal 128M Nand flash / external SD card6. Types of operation methods: touch screen7. Functions: Navigation, MP3, MP4, ... JPG picture,E-Book8. Numbers of signal receiver: 20 Channels9. Antenna: with GPS internal porcelain Antenna ...