Integrated IR illuminator. Single AA battery operation. Automatic shutoff when exposed to bright light sources. Low battery indicator which appears in the eyepiece. Automatic brightness control. Extremely versatile. Handheld. Head mountable. Weapons mountable. Photo / video equipment adaptable. Lightweight. WaterproofThe Sightmark PVS14 is a combat proven night vision system currently used by the US military and Special Forces. This ruggedly designed unit utilizes a single standard AA battery compartment, making it more lightweight than other similar units. The automatic shutoff feature increases the functionality of the device as it protects the tube from being damaged when exposed to intense light sources. In addition, the adjustable gain serves to achieve the highest quality image performance for varying light conditions.