524' field of view; 700' range of viewBuilt-in infrared illuminators for viewing in complete darknessSteel stringer system for additional precision and controlLow battery indicator and extended infared operation on low batteryObjective lens: 80mm focal length, 4-element glass construction; ocular lens: 12mm focal length, 5-element glass constructionSpectral sensitivity: 400-900nmWeight: 2.5 lbs.Uses CR123A 3V Lithium battery