This precision pen style microscope is slim enough to carry in a pocket. Its pocket clip keeps it close at hand, while the built-in LED illuminates the area being viewed. A beveled opening helps collect and focus light.
The eyepiece has an etched scale with 0.05 mm graduations across a 0–2 mm measurement range. APE describes the viewed image as distortion free and inverted. The microscope is 5 in (127 mm) long and has a 1/4 in outside-diameter eyepiece.