Grades 3-8. Designed for young biology students, this introductory compound microscope features all-metal construction for ruggedness and durability. Its coaxial coarse- and fine-focusing controls make it easy to use and increases accuracy. The 45 dual-view head allows 2 students or a teacher and a student to view microscopic specimens at the same time. A built-in slip clutch prevents damage to the microscope and slides. The advanced cordless LED illumination provides a safer, cooler, long-life lighting system that will increase the microscope's placement options in the classroom. Five-year limited lifetime warranty. Widefield 10x eyepieces with pointer 4x, 10x, and 40xR achromatic objectives that are parcentered and parfocalled Revolving triple nosepiece with positive click stops 3-1/2 movable stage makes it easy for small hands to adjust specimen Fixed condenser and 6-hole rotating disc diaphragm LED cordless (rechargeable) illumination Includes 3 AA NiMH rechargeable batteries and single adapter Size, 10-1/2 H x 4 W x 6 D; wt, 4-1/5 lb