ò Fully focusing with coated optics and anti - bloomprotection ò Self - energizing power supply - eliminates the need for main batteries. ò Contemporary lightweight design with rugged composite housing ò Detachable IR illuminator for use in darkest conditions ( 3 - volt lithium battery for illuminator not included )ò Features: attached lens cover, wristlanyard, padded case,and 1 - year limited warrantyLight IntensificationHighImage Magnification2.5xDimensions5.9"( l ) x2"( w )x3"( h )Weight.94lbsBatteries ( For IR Illuminator )CR - 123AField Of View15 degrees ( min )Eyepiece Adjustment+/ - 4 dioptersFocus Range4.4 to 300 ftObjective Lens Focal Length50 mm w/P20 phosphorObjective Lens Aperturefl.5IR IlluminatorDetachableWarranty1 yearGain800 - 900System Gain10,000 - 15,000