The Bower Night Ninja night vision goggle is an elite headset scope, for uninhibited hands-free night exploration. IT is constructed of a durable, lightweight plastic composite and can operate in intense temperatures (-20 degree to +110 degree) and weather conditions. Activate the 1st generation intensifier with the push of the power button to ignite your field of view in dark conditions. Hit the infrared LED button to project the strong IR illuminator with focus beam, brightening up your sights for up to 485 feet (149m). The diopter adjustment of +4/- 4 and infinity range of focus allows seamless, crisp focusing on just about any object in range. The Night Ninja also boasts solid resolution (24 lp/mm) and an impressive 10-inch minimum focusing distance.