Made of durable metal and ABS housing, compact and lightweight. The jeweler's magnifier is complete and requires no assembly. Features a removable reticle scale for measuring the actual size of objects. Lens can be adjusted. Adjustable focal length from 51 mm to 63 mm to suit various needs. 10x magnification for precise detail observation. Equipped with 8 LED lights to illuminate the viewing area. Requires 4 AG9 batteries (not included). Ideal for inspecting circuit boards, watches, laboratory samples, plants, minerals, insects, jewelry, stamps, and more, at home or in the office. Suitable for jewelers, watchmakers, geologists, coin and stamp collectors, photographers, and hobbyists. Model: Complex scale board Material: Metal + ABS Color: Black Package includes: 1 x LED scale loupe Note: Lighting and display differences may cause slight color variations. Measurement error allowed within +/- 1-3 cm.