The first one, delivered immediately, suffered from intermittent power cuts due to movement at the end of the cable connection. The supplier accepted the RMA without further ado. The second has the same problem: bend the cable a little and the power will be cut. I needed it to work so I put heat shrink tubing on top to stabilize it and get the job done. However, this is not a very good long-term solution. Even if I can return it despite the shrink tubing and get one that works right away, it's clear that there is a design flaw and it will eventually fail. So given the $15 price tag, I wouldn't recommend it to anyone but him. hope i get my money back