A classroom basic in black, the Ken-A-Vision 7890BD Vision Viewer is perfect for science-related use, as it offers manual focus so you can decide what elements are in focus as well as image orientation allowing the user to flip the image 180°. The Ken-A-Vision 7890BD features small, dynamic base with no confusing buttons and sturdy, flexible neck that does not sag. It also has an image orientation button. The 7890BD NTSC/PAL Composite Video connection captures over 350 lines of resolution. An included eyepiece adapter fits into the camera head to attach it to the eyepiece of a microscope.