The IR-HUNTER mini thermal riflescope is a rugged and powerful thermal riflescope that is also easy to use. The heart of the system is a state-of-the art 640x480, 12 micron thermal image sensor that provides superior image quality in any lighting condition. Redesigned electronic hardware and a new digital turret controls improve system response and enable the use of external USB power sources and digital video recorders. It's engineered to last and built in the USA. Features: Length x Width x Height: 9.6 in x 3.0 in x 3.2 in (243.84mm x 76.2mm x 81.28mm) Weight: 28.4 oz. (805.13g) Magnification: 1.2x Objective Size: 24mm Power Source: CR 123 or External USB Battery Life: 2 hours per CR 123 Eye Relief: 1.063 in. (27mm) Field of View (degrees): 18 HorizontalAdeg Diopter Range: -6 / +2 Housing Material: Aluminum Submersion Depth: 3.28 ft. (1m) Operating Temperature: -25.6F to 122F (-32c to 50c) Sensor Type: VOx Digital Zoom: 8X Sensor Resolution: 640x480 Sensor Pixel Pitch: 12 Amicrom Focal Length: 24 mm Frame Rate: 30 Hz / 60 Hz Video Output: RS-170