ATTENTION: This 850nm infrared flashlight is not like a normal flashlight, you won’t see its light without using a professional night vision equipment ( night vision scope / monocular / infrared cameras / goggles ). You can only see the red on LED when the flashlight is on.SUPER BRIGHT & LONG RANGE: This light is easily visible with night vision equipment and super bright on infrared that can light things up 300 meters/984ft away. ( 850nm is brighter than 940nm. )SINGLE MODE: Simple turn on/turn off switch, easy to operate that press the tail power button to control.COMPACT & STURDY: Dimension of this infrared flashlight is 4.72 x 1.06inch, this decent size makes it fit well in hand perfectly when it is not mounted. And the quality aluminum alloy makes this 850nm ir flashlight drop-resistant, wear-resistant and scratch-resistant, more durable.ADJUSTABLE FOCUS: Easily adjust its focus by sliding the front of flashlight for flood lighting and spot lighting.WIDE RANGE OF USE: Hunting, photography, camping, night fishing and caving adventure.