The MDI series are applicable for medical health care, high school, advanced placement studies, and situations that demand a rugged and reliable microscope. Built with optical quality. The series includes variable, corded, LED illumination, and a coaxial focusing system. There are features that it has a monocular head, or a binocualr head, reversed nosepiece, wide field 10XD eyepiece, choice of 4X, 10X, 40XRD (sealed) achromat. This series comes with a manufactures limit lifetime warranty. Size: 52X34X25cm3 Weight: 11kg