StarTech SFPGLCSXMMST Cisco Compatible Gigabit Fiber SFP Transceiver Module is fully hot-pluggable, which enables you to install the module without interrupting network traffic or requiring a device reboot. StarTech Fiber SFP transceiver module measuring 0.4" x 1/2" x 2.4" is compatible for use with Cisco modules. Module features 1 x fiber optic LC, ethernet 1000Base-Sx interfaces/ports for improved performance. 100% compatibility with Cisco GLC-SX-MM guaranteed. StarTech SFP modules are backed by a lifetime warranty. Meets or exceeds OEM specifications and Multi-Source Agreement (MSA) industry standards. Low power consumption of less than 1 W. Hot-swappable with fiber-optic modules.