Generation Guard OPKs

🌻JoJo🌻 • Pregnant with #1🤰🏻• Baby J due June 2019 💕

Is anyone familiar with this brand of opk? I got a box for under $10 on eBay and was just curious if anyone else has tried them, I can’t find a whole lot of info on them compared to other OPKs online. They seem to be working ok so far, I think I’m starting to see a line.

Thanks!