This is a binocular microscope for the serious student. The Observer IV microscope is designed for secondary education. Standard features include a moveable 1.25 Abbe condenser, coarse and fine focus, 4-hole nosepiece for up to 1000X magnification, and an iris diaphragm. A multitude of options is available to fit every customer's needs and school bid specifications. Has MOBI, the cordless, rechargeable LED lighting system. Construction Heavy cast alloy Acid and reagent resistant finish.  All metal gearing Head Standard monocular head Bearing mounted, rotates 360 degrees 10X/18 wide field eyepiece Locked-in eyepiece with pointer installed Binocular and teaching heads available.  Objectives 4-position nosepiece DIN Achromatic 4X, 10X, 40XR and 100XR (oil) Parfocal and parcentric.  Color coded Stage Pre-drilled and tapped for optional mechanical stage Spring loaded slide clips included Stage size: 122mm x 120mm Adjustment Controls Coarse and fine focus with tension adjustment Adjustable stage stop Illumination Moveable Abbe condenser, NA 1.25 Iris diaphragm Swing-out filter holder Choose: 20w tungsten, 7w fluorescent, 15w variable halogen, or cordless LED MOBI Input 110V (220V optional) Mirror illuminator included for field use Accessories Included Dust cover, mirror illuminator, blue and green filters, two fuses, spare bulb, manual and warranty card. Warranty Lifetime on materials and workmanship. One year on electronic components.  Dimensions and Weight Height: 14" (355mm) Length: 7.7" (196mm) Width: 5.5" (140mm) Weight: 6.9 lbs. (3.1kg)