AUTOMATICALLY adapts to 10 Mbit/s, 100 Mbit/s (Fast Ethernet) or 1000 Mbit/s (Gigabit) Speed And Extends in over Multi Mode Fiber to up to 2 km (Transmission Wavelength - 1310 nm) Supports Dual Speed Fiber Mode (configurable by dip switch) Select 1000Base-FX or 100Base-FX interconnecting with existing fiber nodes is easy with this media converter. Wavelength 1310nm, Use it with Multimode Fiber Only. SUPPORTS Jumbo Frame & LLF feature - for increased end-to-end TCP performance PLUG & PLAY - Simply plug in optical port and UTP port, and it will work immediatelly FREE UTP Cat5e Patch Cable (1m - 39in) Comes In The Set With Every Unit! - Colors May Vary Depending on Stock;