The WSP-Q40GLR4L-ST is a Cisco WSP-Q40GLR4L compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco brand switches and routers. It delivers dependable 10 GbE connectivity over fiber cable, for 10GBase-LR4 compliant networks, with a maximum distance of up to 2 km (1.2 mi). Technical Specifications: Wavelength: 1270nm to 1330nm Maximum Data Transfer Rate: 40 Gbps Type: Single Mode Connection Type: LC Connector Maximum Transfer Distance: 2 km (1.2 mi) MTBF: 95,832,027 hours Power Consumption: Low power consumption Digital Diagnostics Monitoring (DDM): Yes This QSFP+ fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. StarTech.com SFPs All StarTech.com SFP & SFP+ transceiver modules are backed by a lifetime warranty and free lifetime multilingual technical support. StarTech.com offers a wide variety of SFP modules and direct-attach SFP cables, providing the convenience and reliability you need to ensure dependable network performance.