Design a Photocopier Spycam

WANTED: Photocopier Spycam -To record copied printed documents from a Photocopier. You need to anwer those questions: -How would your design fit seamlessly on the device. I should be able to integrate it easily. And of course It shouldn't be obvious your device is there... -How does it manage battery life, because batteries don't last long. How does the activation and deactivation of your device work. Depending on your design: -How does it handle the low light and high speed conditions of the paper?