Firstly using your left hand to hold the barrel of the monocular, you can see a round field of view. Then turning the manual-wheel of the ocular lens by your right hand for adjustment of the focus length, till your eye have a clear vision. Pay attention to the scale location under the manual-wheel of the ocular lens.
The monocular has the characteristic of rubber eyepatch that can be turndown. The user who wears glasses can use this monocular directly. This make the vision more convince and more comfortable.
when cleaning the lens, please do use the special cotton flannel that attached with the monocular, or other soft and clean cloth.
For removing the dirt or stain, please drop one or two drops of alcohol on the cotton flannel for cleaning.
Please keep the monocular in the ventilate and dry place.
Forbidden to clean the inner parts of the monocular or disassembly the monocular.
Caution: Do not allow using the monocular to watch the sun directly! By doing this, it will cause incurable injury to human eyes.