Big-light gathering lens in a sleek style that can be easily held in one hand. Image intensifier tube provides 500X ambient light amplification. Powerful infrared field of illumination is 35-ft. diameter at 100 feet. Field of view is up to 39 feet at a distance of 100 feet. 5X magnification. Requires one CR-123/3-volt lithium battery (not included). Imported. Dimensions: 7-1/2L x 2.23W x 4H. Weight: 16-oz.