The ASF85-24-X2-D from 10Gtek Transceivers is a Fiber Optic Transceiver with Data Rate 1.25 Gb/s, Wavelength 850 nm, Distance/Reach 550 m, Output Power -8 to -4 dBm, Receiver Sensitivity -18 to 0 dBm. More details for ASF85-24-X2-D can be seen below.