This HP 3CXENPAK91 compatible 10GBase-LX4 XENPAK Transceiver operates at 1310nm over Multi-Mode Fiber, with a maximum reach of 300m connected via a SC connector, built to meet or exceed the OEM's specifications, and comply with MSA (Multi-Source Agreement) standards. All products are 100% functionally tested, and are guaranteed compatible. Our Transceivers (GBIC, SFP, SFP , X2, XFP and XENPAK) are 100% compliant with their designed networking application, and are factory programed with OEM