Specifications Color: Black Magnification: 5 - 20 x Refresh Rate: 60 Hz Resolution: 640 - 480 pixels Diopter Adjustment Range: -5 - 5 dpt Eye Relief: 45 mm Focus Range: 10 m to Infinity Battery Type: CR123 Battery Life: 4 - 12 hours Operating Temperature: -40 - 50 Celsius Weather Resistance: Yes Length: 291 mm Width: 89 mm Weight: 2.4 lb Objective Lens Diameter: 75 mm Display Resolution: 800x600 pixels Field of View, Angle: 3.3 degrees Battery Quantity: 2 MPN TAT176WN7ZEUS51 UPC 849815001532