This is a ultra-small digital spy camera that hidden in a Hydronium Air Purifier , it looks like an ordinary Hydronium Air Purifier , 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 32GB itself, can work up to 16-18 hours. there is time date stamp for the record, you can get the most authentic evidence for a variety of illegal behavior. ideal for CIA agents ,police,detector,home,and spy agency.