The VIAVI FI-60 LFI allows users to easily detect the optical signal without disconnecting the fiber or interrupting network traffic. The FI-60 LFI also includes VIAVI's unique SafeChek™ system, which ensures secure, repeatable coupling with most fiber types, all without having to change costly molds. In addition, the FI-60 system converts into an optical power meter (OPM), giving you twice the tool for the same investment and letting you carry fewer tools to get the job done.