The Pulsar Digisight N550 Digital Night Vision Riflescope w/ IR Illuminator lets you set your sights on darkened targets. This versatile digital night vision scope from Pulsar combines a night vision scope with a digital rifle scope in a single package. The Pulsar Digisight N550 Digital Night Vision Scope features a built-in Infrared Illuminator to supplement low natural light levels. The rifle scope optics system employs an internal focusing mechanism (from 5 yards to infinity) with click-stop focus positions. The focusing system of the Pulsar Rifle Scope provides clear images at extremely short distances and optimizes image quality at all distances within the working range of the scope. Windage and elevation adjustments are handled with a single knob, which switches between modes by pressing a nearby button on the Pulsar Digisight N550 Digital NV Rifle Scope.