Black Box LBH101A-P Industrial 10Base-T/100Base-TX PoE Ethernet Switch - Extreme Temperature, 4-PortConvenient Switches are versatile autosensing four port switches that enable you to quickly add ports anywhere on your Ethernet network. They're designed as part of our Media Converter Switch family and are available in the same robust chassis choices to fit environments ranging from comfortable offices to demanding outdoor installations. You can also choose from a wide range of power supplies and mounting options.