FOPM-203 handheld optical power meter is the advanced version of optical power meter series, which is more functional and intelligent. Under the situation of laboratory, LANs, WANs and CATV as well as long distance optical network, it can be used to identify optical fiber, measure optical attenuation, verify continuity and evaluate fiber link transmission quality combine with FOLS-203 or FOLS-204 optical light source. It offers a quick and accurate testing solution on both singlemode and multimode fibers.