These Ethernet Media Converters meet IEEE Standards and are 10/100Base-TX and 100Base-FX with MDI/MDI-X auto-negotiation. Full set of LED Indicators and 10/100Mbps and full/half-duplex automatically configured in twisted-pair port. Multimode converters have a range of 2km and Singlemode converter has a range of 20km. External power supply included.