The QSFP-40G-LX4 from 3Coptics is a Fiber Optic Transceiver with Data Rate 40 Gb/s, Wavelength 1270 to 1610 nm (CWDM), Distance/Reach 150 m, 2 km, Output Power -7 to 3.5 dBm, Receiver Sensitivity -7 dBm, -11.7 dBm. More details for QSFP-40G-LX4 can be seen below.
