Tri Power (1X/2X/4X) Stereo Microscope - D-ELS-1 Specifications National Optical's all-new D-ELS-1 tri power stereo microscope features 10X, 20X, and 40X magnification and is ideal for elementary, middle, and high school education levels. This budget-friendly stereo microsope features rechargeable top/bottom LED illumination, fixed arm, and stage clips. MAGNIFICATION 10x, 20x, and 40x Tri Power FRAME Fixed arm stand ILLUMINATION Top/Bottom LED Illumination rated up to 50,000 hours Rechargeable Batteries allow up to 500 recharges STAGE Locked-on stage clips PACKING Molded styrofoam container with rubber eyeshields and vinyl dustcover. Individual: Ship wt. 9.5 kgs (21 lbs), Dimensions 41x41x28cm (16x16x11 in.) Master carton pack 2 each: Ship wt. 13.2 kgs (29 lbs), Dimensions 48x38x36cm (19x15x14 in.)