Urban Survivor does a comparison of the sub US$300 digital night vision devices. The Nightfox Prowl is a hands-free night vision monocular that combines natural and night vision for total awareness. It boasts dual IR LEDs for covert or long-range viewing, records HD video onto a large memory card, and mounts on tactical helmets for airsoft or military use. Its focusable screen, tough lens, and replaceable sensor cap make it perfect for any low-light adventure.