[product parameters] Product Name: Jewelry Magnifier Magnification: 40X Product weight: 75g Product size: 50 25 25MM Lens: HD optical glass lens Mirror size: diameter 25MM Mirror body material: stainless steel Battery specifications: 3 LR1130 button batteries Power information: 1 LED lamp bead (white light purple light) This is a very simple, mini folding magnifying glass! ?Tips? Measurement is manual measurement with 2-3mm error The lightweight construction is perfect for professionals or amateurs on the go. Ideal for geological and gemological enthusiasts who need portable amplification equipment in the field. Used for watch repair, reading beautiful prints, photography analysis, coins and stamps. Everyone needs a magnifying glass, a multi-purpose mirror, easy to operate[Application]: Ideal magnifying glass for viewing fine details of books, newspapers, magazines, maps, electronics, miniatures, jewelry, medicine bottles, hobbies and crafts. [Best choice holiday gift]: Simple, exquisite and healthy design makes this product the best holiday gift for your friends, family or lover. [Folding design]: compact folding design, perfect size! Small, suitable for shirt pockets, handbags, beauty cases. No storage failure, easy to carry, ergonomically compact design. [High quality] stainless steel high quality optical lens, 40X ultra clear, no distortion, anti-destruction, very suitable for reading books and maps, optical glass absorbs ultraviolet rays, avoiding ultraviolet damage to the eyes. [Lightweight design]: The weight is evenly distributed. 75 grams, its lightest miniature magnifying glass. Holding no more arm fatigue!.