... 128MB available upon request)Flash memory:64MB(up to 2GB)/external SD card;6 Types of opertation methods:touch screen;7 ... ,Flash,FM transmitter(optional),Bluetooth 2.0+EDR(optional),Support external TMC receiver(optional),AV-IN(optional);8 Numbers of signal ... Precision of Locating:less than 10m10 Antenna:With GPS internal Antenna and reserved external GPS Antenna jack;11 Batty:with 1200mah built ...