This is the Document Portable Scanner that preserves important documents, letters, or recipes onto a microSD memory card for later retrieval on your computer. Its sensitive color image sensor scans at high (600 dpi) or standard(300 dpi) resolution. Images are saved as JPEG files stored on an inserted microSD card. You can then download your images to your computer using the included USB cable. You can see the papers number as scanning and no need to install any specialized software. You can read the data by MicroSD card directly with this Document Portable Scanner. No scanning pen, you can read the data by card reader and USB cable with this Handheld Portable Scanner. Stability control system, double wheel and full-page scan, the Portable Document Scanner is a best choice for your working.