brand new and high quality Features: 1. It is adjustable with 60x to 100x power zoom and comes with clear white light which is made by the long life (10 years) crystal LED. So it is without restrictions when used 2. Sight is clean and precise. The clear white light source close to the natural light ,there is not color cast. 3. Low power consumption. The operating current of crystal LED is 0.015A that is 18 times less than the flashlight's power consumption, light bulb consumes 0.25A. 4. Works on 3 LR1130 batteries that are included. Bright LED Light that keeps things clear and the focusing dial allows correct focusing as well 5. for Ideal for collectors of all things small! Stamps, coins, antique books, insects, plants etc Great for amateur scientists, hobbyists and students ..and for jewelry appraisal, finance, taxation, stamp collecting, electronics observation notes, tickets, mail, money, card paper and print outlets Specifications: 1.Package: paper box - leather - Single installation 2.Magnification:60x-100x(adjustable) 3.The field of view: 4.4mm 4. Working distance: 24.3mm 5. Over length: 82mm 6. Numerical aperture: 0.1 7.System focal distance: -6.25 8. Ambient temperature: -4 ~ 122f 9. Measuring range: 0 ~ 4mm 10.Measurement accuracy: 1% Usage: 1. Pull the battery separate article. 2.Place the specimen on a flat surface 3.Place the microscope at upright position with transparent cover face down 4.Swithc on the Led by the pressing the Power Switch 5.Choose a magnification power(60x-100x) by adjust the zoom power adjusting wheel 6.Look through the eye piece, turn the focusing wheel to obtain the sharpest for image Note: 1.Please do not over-adjust the for focus gear 2. Please avoid severe shock 3. Please do not long expose to the for sun, especially in summer, do not put it close to the heating gas in the car 4. Please do not loosen the rose which should not be rotating, any demolition will scratch the lens malfunction 5. Please clean the lens with a soft clean cloth or lens cleaning paper. 6. Please do not use gasoline, oil, pesticides and other things to scrub the dirty on it. Don'for t scrub it with cloth with soapy water 7.In for case of above 140f, the product will be out of shape 8.In order to not damage the battery liquid instruments, please note the following: a. Cut off the power switch after use b. The battery exchange immediately after use c. If haven'for t used it for long for time ,please remove the battery out of the equipment to avoid leakage which may caused damage to the detector