Tesla has redesigned the UMC "mobile connector" with some of the same features that are in the second generation HPWC wall connector. This includes thermal sensors in the plug. We received our first redesigned UMC a few days ago. It has no obvious external markings to identify it as the second-generation unit. Tesla is back ordered on these units, so if you need a UMC, I would go to the service center and get one.