Before an image intensifier tube is able to enhance low light, this must first be “captured” and be collected. A tube then turns out to be insufficient when the lens with a blocking filter for infrared light can be equated … Continue reading →

The colored mini camera in a pen can be seen as part of an extremely unobtrusive security system with mini radio transmitter, which is flexible and easy to position. Slight movements of the person writing does not affect. It is … Continue reading →