VisibleDust Quasar Plus Sensor Loupe 7x Magnifier Improved Focusing System Six (6) super bright LEDs with vari-angled orientation designed specifically to create a 3D representation and identify the smallest spots with the highest resolution ED Glass (Extra-Low Dispersion glass) and Fluorine coating (MgF2) reduces chromatic aberration and creates a sharper image 7x magnification 52 mm metal ring to attach filters and close-up lenses for higher contrast and magnification Includes two (2) CR2032 lithium batteries and a hard case Amber filter effectively blocks blue light increasing the contrast and reducing the glare accompanied with sharper image and less strain to the eyes Blue light blockers are ideal for low vision users UV filters can enhance image clarityand protecting the ED glass lens Polarized filter can be helpful in distinguishing stain from dust