4 interchangeable sharpness lenses: optical glass lenses include 1.5 times at 20 inches focal length / 2.0 times at 10 inches focal length / 2.5 times at 8 inches focal length / 3.5 times at 4 inches focal length.
Head-mounted design: The housing frame is made of lightweight, durable and impact-resistant materials.
Comfortable headband: It fits your head easily without discomfort. This kind of hands-free hand strap can improve the comfort when wearing.
Adjustable sun visor: The sun visor can be tilted up and down as needed and can be removed when it is no longer needed. Can be worn on prescription glasses or goggles.
Multi-purpose: The binocular headband magnifier can provide hands-free magnification to meet different magnification needs: jewelry making, clock making, needlework, artwork, electronic inspection, reading, printing inspection and stamp collecting.
