OMAX 40X-2500X Lab Binocular Biological Compound LED Microscope with Vinyl Carrying Case Total magnification: 40X-100X-250X-400X-1000X-2500X; Eyepieces: widefield WF10X/18 and WF25X; Objectives: achromatic DIN 4X, 10X, 40X(S), 100X(S, Oil); Viewing head: 45 degrees inclined 360 degrees swiveling binocular Interpupillary distance: sliding adjustment 2-3/16inch ~ 2-15/16inch (55~75mm); Diopter: adjustable on both eyepiece tubes; Nosepiece: revolving quadruple; Stage: double layer X-Y mechanical stage with scales, size: 4-1/2inchx 4-15/16inch (115mm x 125mm); Stage X-Y stroke (travel range): 2-13/16inch x 1-3/16inch (70mm x 30mm) Condenser: NA1.25 Abbe condenser with iris diaphragm and filter holder, rack and pinion adjustment; Illumination: transmitted, LED light, intensity adjustment; Focus adjustment: coaxial coarse and fine knobs on both sides; Stage upward moving lock protects objectives and slides; All metal mechanical components Light weight vinyl carrying case included; Power supply: AC/DC adapter, 7.5V/7.5W (UL approved) - Input: 100-240VAC, 50/60Hz, 0.5A Max - Output: DC7.5V, 1000mA;Dimension of vinyl case: 7-7/8inch x 7-1/4inch x 13-3/8inch (20cm x 18.5cm x 34cm) 5-year warranty against manufacturing defects