100% HP compatible. The 455889-b21-st is a HP 455889-b21 compatible fiber transceiver module that has been designed, programmed and tested to work with HP brand compatible switches and routers. It delivers dependable 10 GbE connectivity over fiber cable, for 10GBase-LRM compliant networks, with a maximum distance of up to 200 m (656 ft). Technical Specifications: wavelength: 1310nm maximum data transfer rate: 10 Gbps Type: Multi mode connection Type: LC maximum transfer distance: 200 M (656 ft) MTBF: 145, 858, 878 hours power consumption: digital Diagnostics Monitoring (DDM): Yes this SFP+ module is hot-swappable making upgrades and replacements seamless by minimizing network disruptions. Star Tech offers a wide variety of SFP modules and direct-attach SFP cables, providing the dependability and reliability you need to ensure consistent network performance.