F.Dorla Waterproof 16x52 Dual Focus Optics Zoom Telescope Monocular Scalable Telescopic 66m/8000m Day and Night Vision 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 Easy focusing Suitable for Golf, Scope, Camping, Hiking, Fishing, Bird watching, Concerts, etc. Dual Focus design: can look much longer distance and more distinct With low-light-level night vision built-in design, it has clear vision when there is reflect light at night The monocular offers an 16x magnification and a 52mm objective diameter The viewing filed: 66M/8000M