The Transition Networks TN-QSFP-40G-LR4 is a high-quality 40GBASE-LR4 QSFP+ transceiver designed for use with SMF fiber optic cables. With a maximum transmission distance of 10km, this transceiver operates at a wavelength of 1310nm. It is compatible with Cisco networking equipment, making it a reliable choice for enterprise networking and server applications. The brand's reputation for producing top-notch networking solutions ensures that this product will meet the demanding requirements of professional networking environments.