Night Owl Optics 5-Power NOXM50 Night Vision Monocular High quality all-glass optics - objective and ocular lenses. One solid focusing ring. Single hand operation. 500x light amplification. Generation: 1, Magnification: 5x, Lens Diameter: 50 mm, Angular Field of View: 15 degrees, Field of View at 200 ft.: 39 ft., Dimensions (inches): 7.75L x 3.79W x 2.48H Weight (without batteries): 16 oz, Power Supply (not included): One 3-Volt Lithium Battery, Minimum Focus Range: 5.7 feet, Built-In Infrared: Yes The Night Owl NOXM50 with 5X magnification is the most rugged monocular in our line. Features an extended body with protective finish. The unit also comes with a hand strap and robust molded plastic focus ring. Uniquely designed for comfort and easy operation of both power and Infrared buttons.