The Armasight Nyx-7 PRO is an extremely rugged but compact bi-ocular night vision goggle. Built with the highest grade optics - and with simple, reliable electronics - the Nyx-7 PRO gives clear, bright night vision images. For hands-free use, it can be worn on the included ip-up head mount or optional universal helmet mount. For hand-held use, a number of optional afocal lenses are available for middle to long range observation, along with optional IR illuminators. Requiring only a single CR123 or AA battery for hours of night vision operation, the Armasight Nyx-7 PRO comes with built-in short range IR illuminator and IR and low battery indicators (displayed to the user in the eyepiece). Waterproof, rugged, light and compact the Armasight Nyx -7 PRO is the perfect hands free unit for the casual user right through to the most demanding professional.