100% brand new and high quality Please install surge protector within 1 meter from device protected. The closer, the Better! To prevent Routers and other connection equipment being struck by lightning To prevent the notebook being struck by lightning With 8 Lightning protection tube Protects your Ethernet device from the damage of lightning & surge. Easy to install. Install between Ethernet and the protected device Connectors: RJ-45 Material: shielded aluminum alloy Dimensions: (L*W*H)4.50*2.60*2.50cm/1.77"*1.02"*0.98" Supports Ethernet card, Repeater, HUB, Switchboard, Router or other Ethernet devices Quantity:1Pc