Review on Qooltek ST-NET Ethernet Surge Protector with PoE+ Gigabit Modem Thunder & Lightning Protection - ST-RJ45 by Robert Arneson

Contrary to some reviews this is a well designed device in my opinion. has appropriately shielded connectors, which is important if you are using a shielded Ethernet cable. The more expensive APC Ethernet surge protector doesn't offer screen continuity. The screen is not connected to the earth conductor and does not actively participate in overvoltage protection. But the continuity of the umbrella circle is important. These devices are very versatile and use parts called high speed diodes and TVS diodes. Processing quality is ok.