The handheld optical power meter is an instrument which are used to measure the magnitude of optical power. The fiber optic power meter can be used for both direct measurement of optical power and relative measurement of optical attenuation. With the rapid development of fiber optic communication technology, fiber optic communication has become the main transmission for various communication networks. Optical power is one of the most important parameters for evaluating the performance of optical terminal equipment and evaluating the quality of fiber optic transmission. BD-POW-2A05 is used to measure absolute optical power or relative loss of optical power through a section of optical fiber. It is widely used in communication trunk laying, equipment maintenance, scientific research, and production. The optical power meter price is competitive.