Nowadays, mobile phones basically have the function of taking photos and videos, and more and more people are using digital cameras, so it is very likely that we may enter into others' photos without noticing, then spread around on the Internet while we don't even realize it. But this is still considered as a better situation. In some places, if there are installed cameras and you don't know about it, all your actions might be secretly filmed, which would be a terrifying thing. Modern people have their own privacy, and individual awareness is getting stronger and stronger, but the development of science and technology makes modern people feel less and less secure. It's hard to have a private space for oneself, so I guess such camera detector should be popular among those who value personal privacy. This camera detector in the shape of a USB flash drive can scan a room and accurately know where the camera is installed, even if it is installed in a very hidden place. Before going to an unfamiliar place, you can use this small device to check, to ensure that you're not being monitored by others. The price overseas is about $87.