AUTOMATICALLY adapts to 10 Mbit/s, 100 Mbit/s (Fast Ethernet) or 1000 Mbit/s (Gigabit) Speed And Extends Ethernet over Single Mode Single Fiber to up to 20 km (12.42 Miles) NO MORE Integration Hassles, simply plug in Ethernet cable to any Ethernet port, whatever speed it is! UPC (Blue) Type Fiber Patch-cords Supported. Only 1 fiber needed - WDM (1310nm/1550nm) wavelengths used SUPPORTS Jumbo Frame & LLF feature - for increased end-to-end TCP performance - Configured on demand using Dip-Switches PLUG & PLAY - Simply plug in fiber optical port and UTP RJ-45 port, and it will work immediately WHAT YOU GET: 1 pair (2 units) media converters and FREE UTP Cat5e Patch Cable (1m - 39in) Comes In The Set With Every Unit! - Colors May Vary Depending on Stock. + Wall Mount Ears comes in set with every unit as well!