The EZ-SPPOEG v2 is a low cost 100/1000Mbps Network POE Lightning/Surge 10KA protector to help protect equipment from surges due to lightning and grid power fluctuations.
It protects all 8 CAT6 pins with 7.5V clamp voltage on the data wires and 70V clamp voltage on the POE power wires.
It has an all metal case for EMI suppression.
16AWG ground wire.