Features: 1.Support Cascading: 8 Ports Gigabit Ethernet switch has 2 SFP optical ports, supports cascading, saving optical cable resources. 2.8 Ports: Gigabit Ethernet switch has 8 ports, suitable for intelligent transportation, rail transit, electricity, mining, etc. 3.Industrial Grade Quality: Using industrial grade components and aluminum alloy housing, it can operate over a wide temperature range of ?40C to 75C (?40F to 167F). 4.Wall Mount: The rugged Ethernet switch comes with a 35mm Din rail Clip that you can easily mount on a general 35mm rack. 5.12?58VDC Voltage: 8 port Ethernet DIN Rail switch supports 12?58V DC input and supports redundant power supply. specification:Item Type: 8 Ports Gigabit Ethernet Switch Material: Aluminum Alloy Maximum Output Power: 30W POE Standard: IEEE802.3af/at Working Voltage: 12-58V DC Scope of Application:For Intelligent Transportation, Rail Transportation, Electric Power, Mining, Etc. PackageList:1 x8PortsGigabitEthernetSwitch 1 x User Manual