Electric Can Opener, uses two AA batteries. There is a sensor at the bottom that when pushed, will rotate the blade and the gear. If the blades are too close, you will have to wait a while until it opens up. You can also trigger the sensor by pushing the top button.
Just a side note, the original manufacturer's packaging (just the inner packaging plastic), was brittle, so I repackaged it with bubble wrap. There's just bubble wrap inside and the manual and electric can opener.