This product is a compact-sized industrial switching HUB [40(W) x 60(D) x 90(H)mm] with 8 ports for IEEE802.3u(100BASE-TX) / IEEE802.3(10BASE-T) compliant. In addition, the Auto MDI/MDI-X features automatic negotiation. An ideal product for the place where quietness is required as it contains no fan. Moreover, with metal that is excellent in heat dissipation, the product can operate in the temperature between -20 and + 60°C. There are two supplies of power, and function that prevents power from connecting in reverse.