The BDTRP413L1SD-20 from Shanghai Baudcom Communication Device is a Fiber Optic Transceiver with Data Rate 1.25 Gb/s, Wavelength 1270 to 1355 nm (Tx), 1270 to 1600 nm (Rx), Distance/Reach 20 km, Output Power -9.5 to -3 dBm, Receiver Sensitivity -22 dBm. More details for BDTRP413L1SD-20 can be seen below.