10x 15x 20x 25x Jewellers Loupe Led YanliesoMechanical processing, electronic repair, jewelry appraisal, timepieces repair and miniature engraving etc. Included 10x 15x 20x 25x Lens.Left/right double eye patches magnifier with LED,CAN NOT use it with both of your eyes (when you working ), because focal distance from lens to product is 0.2-2in (0.5-5cm)4 different magnifications can be interchanged quickly. If this magnifier is used for long time, you may use two lens barrels alternately to eliminate visual fatigue and improve work efficiencyLOUPE- The loupes are mounted on the black eyeglass frames and can be adjusted for comfort while keeping your hands free. These are top quality and boast a magnificent 10X 15X 20X 25X magnification range which cannot be beatenTo keep in the best condition, we recommend cleaning with a microfibre cleaning cloth often.HOBBIES- These are super handy for a whole range of applications and hobbies where fine detail and closer inspection is required. Use for jewellery making, coin and stamp collecting/production, electronics, model building, science, watch repair and fine printing.