The STARTECH SFPGLCSXMMST is a Cisco GLC-SX-MM compatible SFP transceiver module designed for 1000BASE-SX Gigabit Ethernet applications. This module operates at 1 Gbps, providing a reliable solution for extending network connections over multi-mode fiber (MMF). It utilizes an 850nm wavelength and is equipped with an LC connector, supporting distances up to 550 meters (1804 feet).