By employing a universal adapter interface, the OFS 300 offers the ability to inspect virtually any connector style for scratches, dirt or other problems normally associated with poor transmission performance. The OFS 300-200C offers precision 200X magnification to easily inspect both multimode and single mode fiber optic connectors. The unique design of the OFS 300 provides a compact, rugged, and easy to use package. A non-removable laser safety filter protects against the accidental viewing of a live fiber. The OFS 300 operates from "AA" batteries or an AC adapter. Includes instruction manual and 2.5mm universal adapter cap for use with 2.5mm ferrule SC, FC, ST & DIN type connectors.