Juniper QSFPP-40G-LX4 Compatible 40GBase-LX4 QSFP+ Transceiver (SMF/MMF, 1271nm-1331nm, 2km/150m, LC Duplex, DDM, C-Temp)- Guaranteed Compatible: In System tested in over 90 OEM switches, routers and servers.- 99.98% Reliability Rate: Functionally, optically and environmentally tested to exact specifications.- Industry Leading Lifetime Warranty: For more information by product line, visit our Warranty page.- 98% On-Time Delivery Rate: Extensive inventory guarantees same day shipping.- Full Service Technical Support: Call, chat, email or meet for expert optical connectivity support.