Features: Not dizzy-. According to the size of the-head, the elasticity- can be adjusted freely.It has the characteristics of anti-scratch and easy to clean-. It-is suitable for unlocking and field observation. It is-suitable for learning and office. Inspection, processing, installation and repair of various operations in the electronics industry. For-Facial skin, pore observation, manicure-, ear picking. in the beauty industry. Sculpture and appreciation of artworks-. Work of dentist, tailor-, embroidery. Inspection and repair of cameras, clocks. It is-usually used-by people when reading, especially suitable for reading in the dim- light for the elderly and students. Power-supply model: USB rechargeable (full charge can be used continuously for 8-12 hours). Specifications: Material:Plastic Diameter:Approx.20cm/7.87inch Use two 7th batteries (excluding batteries forsale). The single lens, double lens or triplelens can be adjusted flexibly according to the needsof work, and various combination of different magnifications can be changed flexibly. The detachable LED light boxes design can be combined or separated into two different uses. The angleof LED lights sourcecan be adjusted freely up, down, left and right. The size of the headband can be adjusted freely according to the size of the head, making it comfortable. Product multiple: 1.5X, 3X, 8.5X, 10X. The magnification of the mainlens is 1.5X, and it can be 10X with the auxiliary lens. The magnification of single primary lens is 1.5times, that of double primary lenses is 3times, that of single secondary lens is 8.5times, and that of primary lens + secondary lens is 10times. Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Magnifying-Glass 1x Instructions