Ubiquiti PoE adapters provide a variety of features to help protect your PoE devices: - Surge protection - Clamping protection - Surge peak discharge - Peak impulse current - Grounded AC power cord Electrostatic discharge (ESD) is a leading cause of failure in outdoor devices. You can effectively protect against ESD damage by using a grounded Ubiquiti PoE adapter,... TOUGHCableTM and TOUGHCable connectors.