"The PVS14 night vision monocular is the most versatile and popular night vision product ever made, they truly are the Swiss Army Knife of night time equipment. PVS-14 night vision are capable of handling and excelling at almost any task at hand. From security, surveillance, navigation, hunting, home defense, and wildlife management to name just a few. PVS14 are small, lightweight, and work equally well mounted on an AR-15 rifle or mounted on your head for hands free operation. In addition to the fantastic performance and versatility, PVS-14 night vision are full Military Spec quality so durability and longevity will be the absolute best you can get and they are fully waterproof. The other most noteworthy feature on PVS14 is the Manual Gain control that enhances the units capability and enables them to better resolve images in both brighter light as well as very low light."