The BDTRP653S1SN-20 from Shanghai Baudcom Communication Device is a Fiber Optic Transceiver with Data Rate 2.5 Gb/s, 2.125 Gb/s, Wavelength 1270 to 1570 nm, Distance/Reach 20 km, Output Power -6 to 1 dBm, Receiver Sensitivity -18 dBm. More details for BDTRP653S1SN-20 can be seen below.