The Flir HS-307 Command thermal night vision monocular has a resolution of 320x240, 30hz refresh rate, and a maximum range of 1,400 yards. The display itself auto-focuses, and the iris-style eyecup controls light emissions. The HS-307 Command features a 2x digital zoom, military standard white-hot and black-hot displays, and 4 levels of Instalert™ polarity which colors heat above a certain temperature bright red. FLIR 431-0004-11-00 HS-307 COMMAND