The NVD Magnifier is the all-around best multi-functional night vision monocular available. Head or helmet mounted, the NVD Magnifier allows the user to retain their night-adapted vision in one eye while viewing their surroundings through the illuminated eyepiece. The new battery housing completes the perfect package by allowing the user to power off the unit when in an upright position and power on when flipped down. Under extremely dark conditions, gain control allows the user to adjust the gain upward, giving a better image. Under high light conditions, details can be washed out due to an excess of light.