1 [Protect Your Devices] Connect the Ethernet surge protector to your network cable to protect against network surges. This is excellent protection for your expensive router and outdoor POE antenna. 2 [Complete Protection] The Ethernet surge protector has 8 built-in TVS lightning conductors to prevent lightning and other abnormal currents from damaging your computer equipment via the network cable. 3 [Wide Application] The RJ45 surge protector is used in a wide range of applications and is ideal for protecting network workstations, printers and other Internet-connected devices with network Ethernet connections. 4 [High performance] The fixed interface of the RJ45 surge protector protects against external EML, RFL and other electromagnetic interference, effectively preventing damage to the network signal. PC flame retardant material, 100V0 fire rating. 5 [Plug and Play] Lightning protection without input or output cable side, both sides are the same RJ45 interface, no matter if your protected equipment is behind any specific side, as long as the correct cable is connected, it will work correctly.