... military explain, electronic commerce, electronic government affair, science study, work report, remote medical treatment, product unfurl meeting, train, hotel, ... system distinguish rate: 0.1mm4.system work temperature: 0~5. the persist work time of signal pen: more than 80 ... inserting manifold picture format,standard character object10.it sustain .shw,.pdf, .bmp, .jpg, .gif, .png, .tif, .pcx, .html ...