Notice：batteries are Not included Features 1. With detachable light source box, this is easy to take out. 2. The angle of lamplight can also be adjusted freely 3. The lens assembly parts are added to two; you can also overlap tow lenses. 4. You can also use this product even if you wear glasses 5. Dial adjustment headband conforms to comfortably fits most head sizes 6. There two parallel lens assembly parts and you can also overlap tow lenses for getting a higher magnifying multiple. 7. 2 Bright LED Bulb to illuminate Viewing Field 8. It can be quite easily used under the following conditions: - Fixed Lens: 1.5x - Flip Lens: 1.5x - Loupe: 7X Specifications: 1. Material of lens: Acrylic resin(Processed by crack-proof rigid coating) 2. Main Materials: ABS resin, PP resins 3. Fixed lens magnifier: 4X-89 x 29 mm (L x W) 4. Flip lens magnifier: 4X-89 x 29 mm (L x W) 5. Round Single-eye magnifier: 5X -29 mm (dia) 6. Power by: 2 x AAA batteries (Not included) 7. Color: Black 8. Size: 25 x 19.8 x 6.5 cm (L x W x H) 9. Adjustable perimeter of headband: 21.26-27.17inch/54-69cm Package Includes: 1 x Head Magnifier(batteries are Not included) Notice：batteries are Not included