Double Lens Head-mounted Headband Reading Magnifier Loupe Head Wearing 4 Magnifications Electronic gold tester Auto power off after 3

Auto power off after 3 minutes and easy on-key calibration

will you be cut by a tape measure

Package weight: 300g / 10

can provide short-term high current

Double Lens Head-mounted Headband Reading Magnifier Loupe Head Wearing 4 Magnifications Electronic gold tester Auto power off after 3Features: 4 Replaceable interconvertible magnification lens plates to meet different magnifying needs. Lens are ground and polished to precision ophthalmic standards. The shell frame is made of lightweight, durable and impact resistant materials. Adjustable head band for more comfortable and tight head wearing. Widely used in mechanical processing, electronic repair, jewelry appraisal, timepieces repair and miniature engraving, etc. Specifications: