The B-N1213-S3320C from Shanghai Baudcom Communication Device is a Fiber Optic Transceiver with Data Rate 2.488 Gb/s, Wavelength 1260 to 1360 nm, Distance/Reach 20 km, Output Power 0.5 to 5 dBm, Receiver Sensitivity -28 dBm. More details for B-N1213-S3320C can be seen below.