Set the interpupillary distance by grasping the lens-barrels and banding the body of your binocular until you can see one circle of view. Close your right eye and focus left side by turning the center focus wheel until the object appears sharp and clear. Then open your right eye and close your left eye, rotate right eyepiece until the object is sharp and clear. Now that both sides are in focus objects at different distances can be focused by rotating the center wheel. Note the setting on the scale on the night eyepiece for your eye. Simply return to the same setting for latter use. Convenient eyecups fold down for use with eyeglasses and fold up for use without eyeglasses. They provide comfort and promote viewing ease.
Maintain: When cleaning the lens, please do use the special cotton cloth that attached with the binoculars, or other soft and clean cloth. For removing the dirt or stain, please drop one or two drops of alcohol on the cotton cloth for cleaning. Please keep the binoculars in the ventilated and dry place.