I have chosen to use several Tessan power strips in several places in my house, despite lacking the full UL / ETL certification among the labels on the back of the products… They are NOT the “frontline” surge protectors or UPS units that I have for most of my sensitive equipment in the house, but they do just fine for fans, seasonal lights, or gaming controller charging docks.
I have commented on this topic a few times during the last couple of years, but please take my commentary only as one perspective - I am NOT an electrician, but I have worked with several applications of electrical engineering professionally over the years, and I have gone through the exercises of tearing a few TESSAN (and other branded) products apart, just to be sure that I wanted to trust them at all:
The other point that I would make is that if anyone is concerned, I would likely suggest looking to the far pricier end of the spectrum with Tripp, APC/Schneider, etc… Even within the more common consumer brands that people seem to trust, including Anker, there have been far too many recalls issued just this year for me to feel like I want to say that I find the quality of their products to be a truly compelling upgrade over something like this offering from TESSAN.
No affiliation. Not a licensed electrician. Just giving you some perspective from what I’ve purchased, and what I’ve seen as I’ve been curious enough to dissect some of the products - I’ve trusted this brand enough to use them in a few, lighter applications.