Head Mount Magnifier Headband Professional Jeweler's Loupe Watch Repair Handsfree Reading Magnifying Glasses Optical Glass LensSpecifications Style: Wearing Style Light Source: NONE Certification: CE With Light Or Not: No Details Features: High quality optical glass lens plates are interchangeable. Through double lens "two square glass", you can see clear 3D vision. Strong and compact buckle wear band, which can easily adjust the head size of each user. Very useful way: users do not need to remove glasses, and their hands can move freely. Improve the visual field of the user