***** **********Best Quality Guranteed. *****AUTOMATICALLY adapts to 10 Mbit/s, 100 Mbit/s (Fast Ethernet) or 1000 Mbit/s (Gigabit) Speed And Extends it over Mode Fiber to up to 20 km 12.42 miles - (Transmission Wavelength - 1310 nm), Ethernet to Fiber applications now are easy; *****NO MORE Integration Hassles, simply plug in an Ethernet cable to any Ethernet port, whatever speed it is! UPC (Blue) Type mode LC Fiber Patch-cords Supported; *****SUPPORTS Jumbo Frame & LLF feature - for increased end-to-end TCP performance for media converter fiber unit and end point smooth interconnection; *****PLUG & PLAY Fiber Media Converters - Simply plug in an optical LC port and UTP RJ-45 port, and it will work immediately; *****FREE UTP Cat5e Patch Cable (1m - 39in) Comes In The Set With Every Unit! - Colors May Vary Depending on Stock;