BARSKA Binocular Compound Microscope, 40x,100x,400x,1000x Head rotated 360 degrees. Transmitted illumination. Adjustable interpupillary distance between 55mm- 75mm. Includes Spare Bulb, Fuse, Power Cord and Plastic Dust Cover. Ideal for general medical applications, industrial use, hobbyists/ collectors and educationals purposes.