? Brand: jiahe115 ? Welcome to my store, ? We hope you can find the product you like in our store. ? The main function of the magnifying glass is to expand the image of the subject.? Observation method 1: Observation mirror is closer to the observation target, observed so that the observation target does not move, and the distance between the human eye and the observation target does not change, and then the handheld magnifying glass is moved and moved back and forth.Until the image becomes sharp and clear, ? Observation method 2: Move glasses close to the eye as much as possible.The magnifier does not move and moves the object until the image is greatly clear. ? Use: 1. A colorless achromatic lens.This can clearly observe the identification of the boxes and light and carcinence, photos and gems. 2. It can also be used for testing of jewelry certification, substrate surface quality, color correction, etc. Reading a book, reading a newspaper, work, or use it for many other applications. ? Our product is thoroughly tested, inspected and packed before shipping, so you can buy it with confidence. ? If you are satisfied with our products, please leave your true feedback ? Delivery time is 15-25 days. ? If you still can't receive your order after 30 days, please contact us. ? Manual measurement, there may be an error of 1-2mm, please refer to the actual product.? Magnifiers are suitable for a variety of books, newspapers, magazines, maps, electronics, miniature models and jewelry. ? Material: PMMA resin. ? Lens size: 40X20mm,Size:9cm*4.5cm. ? The main lens zooms 2.5 times / the auxiliary lens zooms 45 times. ? 2.5X Retractable keychain portable LED light magnifying glass,without battery.Magnification Strength: 2.5 x. Lens Material: Glass,Resin. Item Weight: 1 Grams. Batteries Required?: No. Brand: JIHAE115. Date First Available: January 6, 2021. Best Sellers Rank: #65 in Camera Loupes. : B08S6XC277. Item Weight: ?0.035 ounces.