The Startech.com advantage: StarTech.com offers a 2-year warranty and free lifetime technical support on this converter and has been the choice of IT professionals and businesses for over 30 years Ethernet over fiber extension: Use this half/full duplex RJ45 copper to fiber media converter to convert and extend a Gigabit Ethernet connection up to 550 m/1804 ft over multimode LC fiber Includes SFP: For added convenience, this IT-grade network fiber media converter Includes an SFP transceiver, enabling an 850 nm LC multimode Gigabit fiber connection Plug and play: This multimode fiber media converter provides a quick and easy setup; it can be used as a standalone device or installed into the 20 slot 2U rackmount chassis (ETCHS2U) Maximum durability: Built to withstand harsh environments, this rugged media converter has a durable steel housing and has an operating temperature range of 0 degrees Celcius-60 degrees Celcius (32 degrees Fahrenheit - 140 degrees Fahrenheit)