Review on 📷 [3 Pack] OUBA Camera Lens Protector for iPhone 13 Pro/iPhone 13 Pro Max [3 Holes] Tempered Glass Lens Cover, [Case Friendly][Scratch-Resistant] Easy Installation [HD Clear] - Black Circle by Mike Martz

There was no indication of this. Some speak for themselves, but not all. (Now I see there's a video on the Revain product page, but I've googled and haven't found anything on YouTube.) I've gone through all three without a good install. Even with rubbing alcohol, a rag, and a dust sticker (too small to work well) I got a tiny speck of dust every three times. I tried peeling off the backing to remove the dust but it didn't stick to the edge where it was peeled off. The "guide" is quite larger than a screen protector so I'm not sure how it should be used.