Olivia Series Binocular Microscope features a sturdy aluminum die-cast stand for durability and balance. Features binocular head with coaxial focus equipped with rack and pinion mechanisms and positive stops at both ends. DIN objectives 4X, 10X, 40XR, 100XR (oil immersion) are parfocaled and parcentered. Built-in LED illumination with on/off switch and three-wire grounded power cord. Limited lifetime warranty.