The Challenger G2+ 1x21 is noted for versatile functionality. It can be used as a night vision monocular, night vision goggles (if set up on a Head Mount; the device can be used either for the right or the left eye), and a night attachment for a day optical riflescope or a collimator sight. The device is also suitable for quality night photography. The body of the device is ermetically sealed which enables use in inclement weather conditions (fog, heavy shower, dusty environment, sand storm etc.). A serious advantage is a large eye relief which enables glass-wearers to comfortably use the device without taking off glasses.