– You can view an object by magnifying it by approximately 1.6 times.- The focal length is as wide as 5cm to 40cm, so you can focus perfectly even if you move the object while working.- There is little burden on eyes and is hard to be tired.- The focal length is wide, so you won’t feel uncomfortable even when you take your eyes off the lens.- The arm that connects the lens and the headband is movable, so it can be used at an angle that is easy to work with.Product Description:- Lens magnification: about 1.6 times- Working distance: about 5 cm to 40 cm- Head circumference: about 53 cm to 66 cm (adjustable)- Weight: about 160g- Body size: about 28 cm in length about 21 cm in width about 6 cm in height- Materials:Lens: Acrylic resin,Headband: Elastomer resin and PP (polypropylene)Made in Japan