Integrated Keyboard Keyboard type: High quality Windows keyboard Switch: 1,000,000 cycle's life Fast functions: 6 dedicated fast function keys PC connection: Fast USB2 Integrated Scanner Scanning type: Sheet-Feed scanner Scanning mode: Color: 24/48** bits high quality Gray: 8/16** bits gray level Black & white Integrated USB2 HUB  USB type: USB2 high-speed hub USB compatibility: USB2 USB upstream: One USB2 upstream connect to PC USB downstream: Two USB2 downstream ports,  (compatible with USB1.1) can accept  low-speed, full-speed and high-speed devices Dimensions L19.1"x7.7W"xH1.2"(max. H2.25") Weight: 2.95Lb Paper documents:  2"x3" to 8.5"x30"  Plastic cards:  3.5"x2.5" up to 1mm smooth plastic cards. Driver license & ID card (KS810-P only)  Other Output formats: pdf, doc, html, jpeg, bmp, tiff, etc. (Automatically protect scan to PDF with password) Document release: Bi directional automatically triggered by document length True-Optical resolution: 600 dpi Optical technology: High quality and reliable color CIS technology Output resolution: From 50 dpi to 4800 dpi Scanning speed: High-speed USB2 scanner Fast functions: 4 dedicated fast scan function keys PC interface: High-speed USB2 Software interface: Twain interface and USB2 driver Power adapter: AC 100~240V