This is a ultra-small digital spy camera that hidden in a Hat , it looks like an ordinary hat, but it has a very powerful function ,the most interest is that it internally hides a smallest camera DVR , it does not need any external plug-in card, built in memory 16GB itself, can work up to 10-12 hours. there is time and date stamp for the record, you can get the most authentic evidence for a variety of illegal behaviour.ideal for CIA agents ,police,detector,and spy agency.