Lightning Arrester RJ45 Adapter Ethernet Surge Protector Network Protect Device Condition: 100% Brand New and High Quality Quantity: 10 Pcs Per Lot Spec: 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: RJ45 Female Material: shielded aluminum alloy Dimensions: (L*W*H)4.50*2.60*2.50cm/1.77"*1.02"*0.98" Note:Size for manual measurement, there may be a 0 to 2 mm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you