TMANGO Head Mount Magnifier with LED Lights, Rechargeable Headset Magnifying Glasses for Close Up Work, Interchangeable Bracket and Headband for Watch Repair, Jewelry, Arts & Crafts or Reading Aid auspowers_batchone They are made using a

They are made using a 1-mil-thick polyimide film with 1

47 inchKeyslot Width: 4 mmHandwheel with threaded hole

The tolerances of the threads are nice

no-leak pouches and contains fuel stabilizer

Support multi-scene and multi-purpose use

TMANGO Head Mount Magnifier with LED Lights, Rechargeable Headset Magnifying Glasses for Close Up Work, Interchangeable Bracket and Headband for Watch Repair, Jewelry, Arts & Crafts or Reading Aid auspowers_batchone They are made using aTMANGO Head Mount Magnifier with LED Lights, Rechargeable Headset Magnifying Glasses for Close Up Work, Interchangeable Bracket and Headband for Watch Repair, Jewelry, Arts & Crafts or Reading Aid Product Features NEW RECHARGEABLE DESIGN New rechargeable headset Magnifier built in Lithium ion battery which is charged by an universal USB port. One hour charging time provides up to 8 hours light up. Why rechargeable? The most advantage is lightweight.