Locate precisely by GPS satelliteMicrosoftWindows CE operating system/3.5"high legibility wearable contact screen,320*240 pixelSupport hand-writingSupport many foreign language display64MB memory cardBuild-in antenna/able to add external antennaSupport USb1.1 Mini connectorindependentloudhailer/stereo ear phone.Support SD card(4Gmax.)1100mAH large capacity chargeable lithium battery110-240V AC/DC travel charger/car loaded chargerVideo player:supportWMV9/MP4/ASF/AVI etc file formats.Audio player:supportWMV9/MP3/MAV etc file formats.Photograph browser:supportJPG/GIF/BMP/PNG etc file formats.Ebook browser: support TXT file format.