This microscope model sets the standard for high school instruction, now with cool, long life LED illumination. Includes all the most commonly specified features. Rugged metal construction, locked-on parts. Superior DIN optical system and precision mechanical components assure parfocalled and parcentered optical alignment for sharp, unsurpassed viewing. Recommended for instruction through grade 12. Optical System - Widefield 10x eyepiece with revolving pointer. Accepts optional #965-160 eyepiece reticle. 45 degree inclined viewing head rotates 360 degree for easy repositioning of eyepiece and sharing by more than one student. DIN 4x, 10x and 40xR objectives are achromatic, parfocalled, parcentered, color coded. 3-hole nosepiece is ball-bearing mounted for more precise alignment, has positive click stops. Illumination - LED light rated up to 50,000 hours life, cool burning illumination equal to a 20 watt tungsten bulb. Base-mounted on/off switch and heavy duty 3-wire cord. Convenient "grabber" clip on plug lets you wrap the cord around microscope and secure in place by pushing cord into clip for easy storage. No bulky cord hanger needed.