The A17693-000 | OCAB-S2-04-B3 from CommScope is a Fiber Optic Attenuator with Attenuation 4 dB, Return Loss 55 dB, Attenuation Tolerance ±0.5 dB, Operating Wavelength 1260 to 1360 nm, Optical Input Power 250 mW. More details for A17693-000 | OCAB-S2-04-B3 can be seen below.