Features Foldable Design: The magnifying glass adopts a foldable design, has a small and delicate shape, and is made of all metal materials, which is strong and durable. LED Banknote Detection And Jewelry Identification: Folding magnifier is a full metal-coated magnifying glass, which supports LED currency detection and jewelry identification types. Reliability and High Precision: The 40x metal optical mirror can be used as needed just by pressing the switch - ON/OFF, with reliability and high precision. 3 LEDs for Lighting: The folding magnifying glass has 3 LEDs for lighting, you can observe objects very clearly and accurately. Applications: Metallic optics can be used in industrial uses (watchmaking, jewelers), medicine, coin and stamp collectors, geography, circuit board and printing industries, gardening, education, home life and offices. Specifications: 1.Full metal coating magnifying glass magnifier. 2.LED currency detecting & jewelry identifying type. 3.Features 3 LEDs for illumination. 4.Push the switch to turn on/ off. 5.Applications: Industrial purpose (Watch making, Jewelers), Medical science, Coins and stamp collectors, Geography, Circuit board and printing industry, Gardening, Education, House living and offices. Features: Model: NO.9890 Material of Lens: Metal,Acrylic Optical Glass Magnification: 40X Illumination: LED light Power by 3 LR1130 batteries (included) Lens diameter: 25mm Size: 110(L) x 31(W) x 28(H) mm Package Contents: 1  x   40X LED Magnifier Package List