Designed to facilitate teaching at the elementary level using the standard microscope format most commonly used in U.S. schools. 45° inclined viewing head is very convenient for younger students. Extra bright 15-watt illumination is built into base, features on/off switch on base and heavy-duty, 3-wire grounded cord and plug. Rugged metal frame, precision optical glass lenses. Student proofing features minimize loss of parts and other student abuse. Recommended for instruction through grade 6.