Superex? Monocular Dual Focus 18 x 52mm HD Optics Telescope Zoom Green Optic Lens Armoring Monocular Use waterproof design: the mirror is full of the high-purity nitrogen, waterproof and antifogging. You can use it in raining day and humid environment, and have no need to worry about this item The main part of the mirror body is metal material, and the outside shell is the high quality flexible rubber. Dual Focus design: can look much longer distance and more distinct Size: 15 x 5.7 x 5.7cm,With cylindrical shape design. The viewing filed: 103m/98500m,With low-light-level night vision built-in design, it has clear vision when there is reflect light at night.