Magnification: 3.5X,Working distance: 420mm;The power of the LED bulb:1 W;The lifetime of the bulb:10000 hour;Silver, Blue, Black, Red color are in US stockﾃつ｣ﾃつｬ5-7 days delivered after we ship it out.;WARNING: The quality for the loupe with headlight we offer is the highest, which totally values your money.We offer special material for the Optical Glass,you can tell the difference from the other sellers. Please confirm the order from Aries Outlets. We are committed to the spirit of Pursuit of high quality,customers' satisfaction,with the principle of the most preferential prices,the most attentive services and the most reliable products' quality.