Keep the receipt. Lidl has a good return policy (usually 3 years on many items), so if the resistance mechanism fails after a few months—which can happen with budget electronics—you can get a refund or exchange.
The closest thing to a "paper" is a detailed teardown by electronics hobbyists. Look for: motionciser lidl
No formal academic paper exists on this consumer product. If you are writing a research paper that involves the MotionCiser, you would need to cite the user manual as a "technical specification" and treat your own experimental data as primary evidence. Keep the receipt
It is incredibly compact. It takes up about as much space as a small wastebasket. It is lightweight enough to be moved from under a desk to in front of the sofa easily. Look for: No formal academic paper exists on