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, 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 harsh environments, Stable operation. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Voltage: AC110V Material: Aluminum alloy colour: black Package Contents: 1 x Network Switcher 1 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.