The SFP-1503-B-D from 10Gtek Transceivers is a Fiber Optic Transceiver with Data Rate 100 to 155 Mb/s, Wavelength 1550 nm, Distance/Reach 120 km, Output Power 0 to 5 dBm, Receiver Sensitivity -35 to -3 dBm. More details for SFP-1503-B-D can be seen below.