... AT840 LCD: 5.0-inch TFT 4-line resistance touch screen Operating system: Windows CE.Net 6.0 Supports SD ... maximum 8GB) Supports WMV9, MPEG-4, WMV, ASF, AVI, MP3, WAV, JPG, GIF, BMP and TXT Supports FM transmitter and ... state ,auto-off backlightDisplaySpec5TFT LCD Display +54-line resistance touch screen, Support full-touched controlfull hand-writingResolution480*272RGB,262K colorBacklightAdjustableGPS ...