The MSB-2x2AD from DiCon Fiberoptics is a Fiber Optic Switch with Insertion Loss 1.0 dB, 1.2 dB, Operating Temperature -5 to 70 Degree C, Optical Power 500 mW, Polarization Dependent Loss 0.10 dB, Storage Temperature -40 to 85 Degree C. More details for MSB-2x2AD can be seen below.