StarTech Dell EMC 3CSFP91 Compatible QSFP+ Module, LC 40km (QSFP40GER4ES) 40GBASE-ER4, 40GE Gigabit Ethernet QSFP+, Single Mode Fibre, 1270nm to 1330nm, DDM, SMF

100% Dell EMC 3CSFP91 COMPATIBLE: Designed, programmed and tested to work with compatible Dell EMC switches and routers to deliver dependable 40GbE connectivity TECHNICAL SPECS: 40GBASE-ER4 | 40 Gbps | Single Mode | LC Connector | 1270nm to 1330nm | Digital Diagnostic Monitoring (DDM) | Distances up to 40 km (24.9 mi) TESTED FOR OEM HOST COMPATIBILITY: Hot-swappable in Dell EMC routers and switches; DDM support reports the transceiver's status to most SNMP network management tools BACKED BY STARTECH.COM FOR LIFE: Backed For Life by StarTech.com on the life of the module itself, not the life of your switch; our modules won't void your OEM warranty and supported by our Tech Advisors 5/24 WORKS WITH MSA COMPLIANT SWITCHES: Also works with switch models from Ubiquiti, D-Link, Netgear, Supermicro, TP-Link and more that accept uncoded modules