eMylo Watch Repair Magnifying Loupe Magnifier Glasses With Led Light Pack Of 20 Loupe location is adjustable on the frame for your comfort using, magni 20x magnification power magnifying glasses, ideal for watch repair, loupe, installing & repairing camera, watch, and other electronics usage. Power by 2pcs CR1620 batteries (included), power source: LED diode. The eyepatch can be flipped freely according to satisfy your needs. eMylo(TM) is our registered trademark, pls don't follow-sell,othersise you will be held liable.