The BD-4321S-C2CDD from Shanghai Baudcom Communication Device is a Fiber Optic Transceiver with Data Rate 2.5 Gb/s, Wavelength 1480 to 1500 nm (Tx), 1260 to 1360 nm (Rx), Output Power 3 to 9 dBm, Receiver Sensitivity -32 to -29 dBm. More details for BD-4321S-C2CDD can be seen below.