Volt: Both 220V and 110V are OK. Feature: Standard: 2040 times the second gear (realize) through conversion lens Can add a pair of WF20X upgrading to: 20, 40, 80 times the three gears The standard arguments: 1, the total magnification of 20X-40X 2, the standard eyepiece for WF10X 3, achromatic lens 2X, 4X, change file type 4, change file type head of binocular vision, tilted 45 degrees, can rotate 360 degrees 5, light source choice: the light source and light up and down You can choose to open one of them Light source all kinds of: halogen lamp light yellow, suitable for pure white plastic particles, etc.And LED (white, suitable for the pure white products) lamp is optional 6, weight: 3.5 KG 7, packing: bubble shock box + carton 8, the product characteristic: the up and down with electric light source Double lighting can study opaque small solid material such as jade, chips, used as a gemstone microscope. Or unpaid dispute will be filed for non-payer after 7 days of sales day. If you receive defective item, please kindly notify us within 14 days. The item "Binocular Stereo Microscope Magnification 20X-40X LED F Mobile Phone Repair PCB" is in sale since Monday, November 06, 2017. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Microscopes". The seller is "thanksbuyer-hobby" and is located in HK. This item can be shipped worldwide.