Worry-Free Warranty : You will get 1 x network switch and 1 x user manual. Buy now and start enjoying our 30-Days money back and an 18-monoths replacement warranty and lifetime technical support. Managed switches: Management functions include Support CLI, WEB, SNMPv1/v2/v3, Telnet server for management, EEE, LLDP, DHCP Server/Client (IPv4/IPv6), Cloud/MQTT. Universal for DC 12V-48V: Dual power supply design, prevent accidents, The ethernet switch support 12~48V DC redundant power input,And boost to 48V, supporting multiple power supply methods. 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. Gigabit Switch:8x10/100/1000Mbps RJ45+ 2x1000Mbps 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.