This 5 pack of cisco® GLC-SX-MM compatible SFP transceivers provides 1000Base-SX throughput up to 550M over multi-mode fiber (MMF) at a wavelength of 850nm using a LC connector. Each is guaranteed to be 100% compatible with the equivalent cisco® transceiver. This easy to install, hot swappable transceiver has been programmed, uniquely serialized and data-traffic and application tested to ensure that it will initialize and perform identically. All of our transceivers are Trade Agreements Act (TAA) compliant. We stand behind the quality of our products and proudly offer a limited lifetime warranty.