Our multi-powered head magnifier has 3 combinable powers, a forehead rest, and an adjustable hook & loop strap. With 4 magnification options, our head magnifier will have you focused on what you need to see.
• Fixed Lens : 3.0 Diopter
• Fixed Lens+ Flip-in Lens : 6.0 Diopter
• Fixed Lens+ Loopy : 17.5 Diopter
• Total Combined : 20.5 Diopter
• Circumference of the Head Strap Can Be Adjusted with the Hook & Loop Fastener
• Black plastic body
I like the hands free use. And It's fairly solidly built too, so with a little care it should last long enough to be a good bargain.