10 spice jars. Certain spices were very valuable back then. So it would be as good for exchanging into gold and silver.
The motorcycle, because with a good blacksmith forge I can work with some local blacksmiths to reverse engineer it. Then I can kick start the industrial revolution the right way.
I've got enough knowledge to build my own guns. So I don't need those.
Imagine you are in the office trying to discretely bang a coworker and your dirty little secret is exposed to the entire office due to low batteries, or a brief short circuit.