Canon Canoscan LIDE 20 Desktop flatbed scanner. Powered directly from the USB port. This is what Canon say: The CanoScan LiDE 20 is the ideal scanner for starters. It's easy to install
Scanner CanoScan LiDE 20 | Free Libre Open Source Software
Canon CanoScan LiDE 20 Flatbed Scanner TESTED & WORKING - No CD | eBay