 What I have used, night vision, they belong to other investigators. I still don't have my own set yet. Do you remember what Melinda uses? Were they Generation 3 or 4? I believe they were Generation 4, but I could be wrong. She's got really good ones because you can look at the ground. For instance, that sandy road, you can put your hand down in the sand and you can actually see the individual grains of sand in your hand. They're really good. But your third question is,