6KV Lightning Protection: Our poe injector adopts surge protection design and makes it can be used in harsh environment and can survive from lightning strikes up to 6KV. Managed switches: Management functions include Support CLI, WEB, SNMPv1/v2/v3, Telnet server for management, EEE, LLDP, DHCP Server/Client (IPv4/IPv6), Cloud/MQTT. Industrial grade: Outdoor switch are made of industrial aviation aluminum material, with heat dissipation performance far superior to ordinary metal shells. The working temperature is -40 ° C to 80 ° C (-40 ° F to 176 ° F), and the protection level is IP40. Suitable for outdoor work in harsh environments. Universal for DC 48V-57V: Please note that this product is used in industrial field. If you use AC power supply, you must be equipped with “PC Power supply unit” to convert AC current into DC current., The ethernet switch support 48~57V DC redundant power input. Gigabit Switch:8x10/100/1000Mbps RJ45+ 4x1000Mbps SFP with auto-MDI/MDI-X function,Supports auto-negotiation and 10/100Mbps half/full duplex and 1000Mbps full duplex,Full/Half-duplex,9K Bytes Jumbo Frame.