The ACOG night vision product is preferable to offer the manual option to select the brightness control in the device. Most of the ACOG night vision products make use of the six adjustable levels of brightness, which allow the operator to estimate the lighting illumination.
It is usually powered up by the AA type of battery, to last long up to 12000 hours in a continuous manner. The ACOG is a night vision technology product that mainly helps to view the object in the deep dark without the use of the battery source operated by the power supply.
ACOG night vision devices possess the ability to illuminate the object automatically under the low light conditions and are expensive when extra option of features are added to the system.