How is This Magnifying Glass? Perfect for the Elderly, Young and Amblyopic Great Magnifier for Seniors, Children and Those Who Have Low or Impaired Vision of Most Types. It's Excellent for Reading Books, Newspapers, Magazines, Maps, User Instructions, Etc and Other Close Works, Such As , Watchmaking, Handcraft and Exploring. Working Distance: 440-540 Mm 280-380 Mm Field of View: 130Mm 60Mm Material of the Loupe Lens: Optical Glass Attention: a Mount Included, You You Attach the Loupe on Your Own Glasses. Only the Loupe Included, Not Includes the Head Light and the Frame. the Glasses Not Included! Note: 1Cm10Mm0.39Inch Package Included: 1 Loupe Magnifier 1 Head Strap 1 Cloth 1 Screw 1 User Manual 1 Storage BoxClear Distortion-Free Magnifying Lens. High-Precision Glass Lens Brings Subtle Details. Material: Optical Lens, Scratch-Resistant, Abrasion-Resistant. the Shatter Resistant Lens with No Smeaand Bluron the Images. Scope of Application: Student Field Trip, Identification, Inspection and Maintenance, On-Site Observation, Suitable for Children, Adults, Seniors, Amateurs and Professionals. Satisfaction Goal: Our Goal is to Provide Creative, Innovative Products So That Everyone Can Have Quality, High-End Enjoyment. We Are Committed to Making Sure You Love Your Purchase, So If for Any Reason You Are Not Satisfied, Please Contact Us and We Will Make Things Right.