PMCv2 Black Level Restorer for******2010 Panasonic Plasma TVs
If you're looking for one of these you probably already know the details and have one of the relevant model Panasonic TVs. Otherwise, a search gets the relevant info from an AVS Forum thread an a couple of other results. Ordered in 2017 just before trading the plasma up to a larger 4K TV. Pics were rotated by the website.