MidTen 10x25 Compact Binoculars with Low Light Night Vision Large Eyepiece High Power Waterproof Binocular Easy Focus for Outdoor Hunting Bird Watching Traveling for Family

Specifications: Objective lens diameter: 25mm Eyepiece diameter: 15mm Near focal distance: 5m Exit pupil distance: 20mm Objective lens coating: FMC broadband Focus system: Center & Right eye Angle of field: 6.2° Weight of binoculars: 0.68 pounds Waterproof grade: Life waterproof How to use: Large eyepiece, smooth center and right eye focus knob provides easy yet precise focal adjustment. Step 1:you can fold the binoculars until it suitable for both sides of the eye. Step 2:close your right eye and rotate the center adjusting knob until the left eye is clear. Step 3:close your left eye, turn right eyepiece to clear and then you can open your two eyes.