It can be quite easily used under the following conditions:
(1) Operate or read at a dim or dark place
(2) Interesting work such as carving,handcraft and sewing
(3) Assemble or repair small fitting
(4) Check the finished product

Specifications:
Materials: plastic,metal,acrylic lens,glass lens
Material of lens: Acrylic resin (Processed by crack-proof rigid coating)
Magnification: 1.5X, 3X, 6.5X, 8X
Power by: 2 x AAA batteries (Not included)
Color: Black+Red
Product Dimensions: 250mm x200mm x50mm
Package Dimensions: 265mm x205mm x65mm
Weight:180grams (net weight),298grams (including packaging)

Package includes:
1*Headband Magnifying Glass

Note:
Please allow 1-2mm errors due to manual measurement.
Due to the difference between different monitors,there are color differences,please take the real product as the standard.