Amazon Affiliate Link: amzn.to/3tZuom4
Price as reviewed: $18
(Another brand that is in stock: amzn.to/47GGUEW)
This is a head mounted stereo magnifier with interchangeable lenses. (1.25x-3.5x magnification) The lenses are cast plastic, but very clear optically.
You can wear them like a pair of glasses with the included ear pieces and nose support, but as I already wear glasses, I used a small Phillips screwdriver to unscrew the nose support and clipped in the included elastic headband instead. This holds it against your forehead and does not interfere with your glasses.
The interface to your forehead is a rubbery plastic with a lot of dots (soft foam would be better) but the device itself is light enough that you can adjust the headband to be relatively loose so the dots are not poking into your forehead painfully and it is still steady. It is perfectly comfortable for an hour of use, but if you were going to wear it all day you might want to add in some foam padding (or buy a more expensive solution).
The LED light is plenty bright for painting miniatures (my use case) and does last the advertised 5 hours (on high) before needing to be recharged. It has a 300 mAh battery inside.