This document camera/scanner has a 30 FPS frame rate, has an 8.0 MP image sensor, connects through USB 2.0, and has built-in LED lighting. Its display area is similar to an A4 document, and has zoom and image rotation features. It is Mac and PC compatible. Please see my final pic for the list of specifications from the camera's box.
It MSRPs (and is still available online) for ~$185. I've never personally used a QPC20 so I can't attest to its performance matching that price.