The DL-PCSBTC-0208-UU-VV-W-X-Y-Z from DenseLight Semiconductors is a Fiber Optic Coupler with Wavelength 1310 to 1550 nm, Directivity 60 dB, Optical Power 0 to 0.3, (300 mW), Return Loss 50 dB, Operating Temperature -5 to 70 Degree C. More details for DL-PCSBTC-0208-UU-VV-W-X-Y-Z can be seen below.