HT-GS403 *GPS Module:SiRF Star III, 20channels *CPU: SAMSUNG S3C2440A-40 400MHZ *O.S:WinCE.4.2 *Memory: 64MB SDRAM-Offers convenient built-in memory to store pre-programmed maps and can also read data from optional SD *Support SD / MMC card and USB Mini Slot *Internal Mono Speaker / Stereo Headphone; Voice-prompted directions-delivers audible instructions through the internal *Video Player support wmv, .asf and .avi file format, up to 480x272 resolutions *Audio Player support WMA9, MP3 and WMA file format *Photo Viewer support JPG, GIF, BMP and PNG file format *Ebook Reader support TXT file format *Bluetooth Function *FM transmitter Function *TMC Function * Back Reaview Function