10 Gbps | Single Mode Fiber | LC | 40 km (24.8 mi) | Lifetime WarrantyThe SFP-10G-BX-D-40-ST is a Cisco SFP-10G-BX-D-40 compatible downstream fiber SFP transceiver which pairs with StarTech.com's SFP-10G-BX-U-40-ST. They are designed, programmed and tested to work with 10GBASE-BX compatible Cisco switches and routers. The SFP+ transceiver module supports a maximum distance of up to 40 km (24.8 mi) and delivers dependable 10 GbE connectivity over fiber cabling.Technical Specifications:• Wavelength: 1330nmTx/1270nmRx• Maximum Data Transfer Rate: 10Gbps• Type: Single Mode Fiber• Connection Type: LC Connector• Maximum Transfer Distance: 40 km (24.8 mi)• Power Consumption:• DDM: YesThis SFP+ fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions.StarTech.com SFPsAll 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.The StarTech.com Advantage