Tactical Door Viewer
For years Law Enforcement and Military tactical teams used reverse peephole viewers to asses threats behind closed doors before engaging any apartment, house or condo.
They simply put the Reverse Tactical Peephole up to the doors peephole and the viewer, reverses the view, allowing the teams to covertly assess the threats in the room before engaging, without the occupants inside the room having any clue to what's going on outside their door.
Now available in the civilian sector, this is used by Private Eyes, Bail bondsmen, Property owners maintenance men
The Tactical Reverse Peephole can give you the advantage by allowing you to see whats going on inside the home With the Tactical Reverse Peephole there is a soft camera mount at one end that allows you to place a digital camera on it and then take pictures of the reversed view.
An example would be using a Iphone's camera and placing it on the Tactical Reverse Peephole and then start to take some pictures quietly.
Q does this actually work ?
A yes has been used in the military sector for years