Lightning Arrester RJ45 Adapter Ethernet Surge Protector Network Protect Device Condition: 100% 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 lightningTo prevent the notebook being struck by lightningWith 8 Lightning protection tubeProtects your Ethernet device from the damage of lightning & surge.Easy to install. Install between Ethernet and the protected deviceConnectors: RJ45 FemaleMaterial: shielded aluminum alloyDimensions: (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!