Description: JPEG PDF-A4 or PDF-Letter scan-format selection. Color or Mono scan-color selection. Scanning resolutions:300\/600\/1050 DPI selection Directly save JPG(JPEG)\/PDF files to the Micro SD card. Supports Micro SD card of up to 32GB Color display to playback the scanned images. Double Roller design， double roller drive scanning， Scan more stably. Built-in 700mAH Lithium-Polymer battery. Driver free to download for MS Windows 8\/7\/Vista\/XP and MacOS10.4 or above (direct plug-in， driver installation not required) Specifications Image sensor A4 Color Contact Image Sensor Resolution Low resolution : 300x300 dpi Medium resolution: 600x600 dpi High resolution: 1050x1050 dpi Minimum scanning speed for Letter size document Color High resolution Mono High resolution Color Medium resolution Mono Medium resolution Color Low resolution Mono Low resolution 12.0 Seconds 10.0 Seconds 8.0 Seconds 6.0 Seconds 3.0 Seconds 2.0 Seconds Capacity (Based on 1GB MicroSD card. Scan Letter size file， the quantity of scans varies depending on the content complexity) Color High resolution Mono High resolution Color Medium resolution Mono Medium resolution Color Low resolution Mono Low resolution 140 Scans (Min.) 150 Scans (Min.) 550 Scans (Min.) 600 Scans (Min.) 1580 Scans (Min.) 1600 Scans (Min.) Scanner photo size A4，A5，5R，4R，3R and below Scan width 216mm Scan length 300DPI:125!#!amp!*!quot;(max);600DPI:60!#!amp!*!quot;;(max);1050DPI:50!#!amp!*!quot;(max) File format JPEG\/PDF LCD 480*320 HD TFT LCD Dimensions (L!#!amp!*!times;W!#!amp!*!times;H) mm 266!#!amp!*!times;39!#!amp!*!times;28 Auto power off 3 Minutes USB port USB 2.0 high speed Standard battery Built-in 700mAH Lithium-Polymer External memory MicroSD Card (not included) How to Ca