Those are fakes, dont fall for it.

What really works is putting some magic healing crystals on top of the miner,  along with some Chakras aligning holographic power balance magnets.
For best result soak them first for a day in a top grade homeopathic energy enhancing 30C memory solution.  

I will sell you a complete set for only 1 BTC. Shakras alignment of your KnC miner is guaranteed or money back. PM me for details.