Those are popular changers and there's probably a ton of them out there. I know I've got a cabinet at work full of them. The NX-x10's we still use came with them as part of the package. A lot of users wanted the 6 gang chargers, so the KSC-32's went into the cabinet to wait until needed. Haven't had any failures, so they sit collecting dust until needed.
I know there are Chinese knockoffs, but it is entirely possible they are legit. However, the Chinese are pretty good at copying printing on the boxes.