You know now day our technology growth very fast. And some time we can't notice what it is. Example like hidden spy cameras. I just come a cross a website: 10techy.com a few day ago and I found an interesting high-tech product is spy camera. To make sure what it is and to see how great it is, you can go to that site to see many best hidden spy cameras such a hat, a pen, sun glasses or even on a bulb.
I can't believe that a hat also has a spy camera on it. :D