I.R.I.S IRIScan Book 3 Executive (457889) Up to 900 dpi Wireless Handheld Specialized Scanner Scanning Speed: Maximum scanning speed for A4 document : Color resolution : 4 seconds Mono resolution : 2 seconds USB Ports: USB 2.0 Power Requirements: Battery : 4 x AAA alkaline batteries Battery life (scanning to SDâ„¢ Card): 1600 pages (A4, 300 dpi, color) Battery life (scanning and Wifi transfer): 900 pages (A4, 300 dpi, color) Operating Systems Supported: Microsoft Windows 8, 7, Vista or XP (SP) Mac OS x version 10.4 or above Dimensions: 1.02 x 10.11 x 1.22 Weight: 0.45 lb.