SE Illuminated Dual Lens Flip-In Head Magnifier, Head Magnifier, Tools for Repair & Precision Work, Adjustable Headlamp, 4.5X Loupe Magnifying, Black

I like this thing.First off it's totally comfortable. It's super easy to adjust to make it fit your head size, and the whole head band is flexible enough so that it conforms to your head shape nicely. I flipped the magnifying lenses up out of the way last night for a few minutes and totally forgot I was wearing the thing. Didn't even notice it was on my head. So it's really comfortable that way.Second, it works as advertised. There are 2 levels of magnification. One that magnifies both eyes, and then there is the little round piece you can flip down to get that extra level of magnification when you really need it. I haven't tried it yet but I'm pretty sure the flip down round piece can be unscrewed and moved to the left eye if you don't like it on the right eye.Third, the magnification is decent. You can't put it on and suddenly see bacteria and microbes or the nucleus of atoms or anything. It just makes everything slightly bigger. Perfect for modeling or other applications like that.The only problem with it, and this isn't a design flaw...it's just the nature of anything like this, is that it changes your eye's focal point from the actual distance of the object you are looking at to the distance of the lenses which are 3 inches in front of your face. That takes a little bit to get used to as far as focusing your eye, and it takes a little getting used to in terms of hand eye coordination and your eyes are telling you that you're hands are 3 inches in front of your face when they are really 5-6 inches in front of your face. (The object you are magnifying has to be really close to the lenses like that. These aren't binoculars. You can't put them on and see the entire room magnified...only what's right in front of the lenses)The overall construction of the thing seems pretty solid. It's all plastic but it feels sturdy, like it'll hold up for a while. When you're using it it's just sitting on top of your head. You aren't constantly messing with it so there's not much that should wear out over time.For the insanely low price I think it's a great buy if you do any kind of modeling or painting or something where you really need to see detail at a level just bigger than your eyes can do.

I have many magnifying instruments for close-up work, ranging from an industrial B&L StereoZoom microscope head to Hastings triplets, jewelers' loupes, and simple glass or plastic magnifying glasses. Some I carry around with me, some I keep in my machine shop, some near my desk. I have found this headset to be among the most useful of all of them. The flip-down closeup lens is a very useful feature, and the round closeup lens is also. The lenses are plastic, but are good quality; distortion is obvious at the very edges, but most of the field is quite sharp, flat, undistorted, and free of color fringes.With the standard lens pair I find the working distance to be a very useful 6 to 10 inches. The magnification is modest but still very useful. Adding the flip-down lens pair, magnification is considerably greater; working distance is reduced to the 4 to 5 inch range - still not bad. The round closeup lens is much more powerful, and working distance is, by optical necessity, reduced to about one and a half inches. This is still useful, maybe because the whole unit doesn't have to get too close to the target, so outside illumination isn't seriously reduced. The max magnification seems very close to my trusty (and expensive) 10x Hastings triplet, and optical quality is not noticeably inferior.I find these to be very well-chosen lens strengths for a wide variety of tasks - crafts, machine-shop work, searching for splinters, even reading small print.I have a big lumpy head, big enough that when I buy a hat I'm well into the XL-XXL size ranges. The headband of this unit is easily large enough that I have no trouble at all wearing it. I also have unusually wide-set eyes, around 75mm interpupillary distance, which is so wide that most binoculars manufactured today are unusable. But that isn't a problem with the optical design of this unit. And I can wear any of my regular glasses under this with no problems at all.The little illuminator up top isn't a bad design, but I don't find the light to be bright enough to be really helpful. I get better results positioning a separate desk lamp close to the work. Mine didn't come with any batteries; it takes two ordinary AAA cells. Take the illuminator - the whole gray thing on top - off the headset to put the batteries in. Pivot it up 90 degrees, and lift straight up; if you have it positioned right, it should lift off without a struggle. Getting the battery compartment cover off can be a bit of a fight, though.Several vendors sell this headset or very similar ones. Mine was sold by WRM Lighting in NY but seems to have been shipped by Amazon. In any case, it looks just like the one in the Amazon photos, and arrived in perfect condition.The price is extremely reasonable for such a useful unit. I'm going to order a few more and scatter them around the house and shop.