These Fiber Optic Bridge Media Converters meet IEEE Standards and are 10/100Base-TX and 100Base-FX with MDI/MDI-X auto negotiation. These units have a full set of LED indicators and 10/100Mbps and full/half duplex is automatically configured in the twisted pair port. Our multimode converters have a range of 2km and our singlemode converter has a range of 20km. An external power supply is included.