Every NICGIGA Industrial Unmanaged Network Switch is rigorously tested for reliability, quality, and performance. We supply a year warranty for whole products and lifetime technical support. Plug and play: don't need any configuration, fanless design, quiet operation, suitable for intelligent transportation, rail transit, electric power, mining, metallurgy and green energy and other industrial scenarios which needs Ethernet access. Non-Stop PoE Supply with Dual Power Input: Support 2 channel DC48V-58V redundant power inputs and auto failover, ensure high reliability networking system. Industrial Desing: Compact IP40 rugged metal enclosure; Wide working temperature (-30° to 75°); Support DIN-Rail & Wall Mount. 8 Port industrial PoE switch: support DC48V-58V input and standard IEEE802.3af/at PoE output, up to 30W per PoE port. automatically detects and identifies PD devices. (Note: only 48V PoE devices are supported).