FO86305 Handheld optic variable attenuator is used with single-mode fibers. With its features of rugged design, portable, ease-of-use and good cushioning, FO86305 performs just as well in a laboratory environment as it does in the field. In addition, the FO86305 handheld optic variable attenuator has the inimitable function of displaying both the output and the input optical powers. The handheld optic variable attenuator can be used as an attenuator as well as an optical power meter to ensure the complete set of functions with economic cost.