Thunder Protection Design: Power Supply, The port adopts professional Thunder Protection circuit design, Effectively reducing the damage caused by thunderstorms to network systemsImprove system security, Ensure stable operation. No Fan Cooling Holes Design: Made of matte textured iron metal body , With heat dissipation holes on both sidesWith excellent heat dissipation system , Stronger heat dissipation. Metallic Materials Fearless of High Temperatures. High strength body , Sturdy shell. Adaptable to various harsh environments, Stable operation. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Plug Type:UK plug,it applies to Malaysia, the United Kingdom and so on. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Voltage: AC220V / AC100-240V / AC110V Material: Aluminum alloy colour: black Package Contents: 1 x Network Switcher 1 x Power Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.