Handheld pocket monocular, best boys, men, husband, dad, father, boyfriend BAK-4 prism-provides better light transmittance-and brightness, allowing you to use it brighter and clearer, showing the-original color Magnification: 8X; Objective Lens Diameter: 21mm / 0.83 inches; Ocular-Lens Diameter: 13.2mm / 0.52 inches This portable monocular for adults and children, bringing you the best outdoor,, concerts, hiking Size: approx 9x3.1cm / 3.54x1.22 inches, it is-light in weight, small in size, for you to store and manage, will not take up too much space