Thermal imaging camera Keiler-2

Indicates whether it is a:
1. Binocular - for both eyes
2. Monocular - for one eye

The range up to which the night vision device can be used in low-light conditions.

Depending on the model, there are different options to display the image.

Digital night vision devices use a different technology, which makes the devices much cheaper.

The visible field in meters, that can be seen from a distance of 100 meters. This information is often more easily visualised as an angular specification.