Ubiquiti PoE adapters offer a variety of features to protect your PoE devices: - Surge protection - Clamp protection - Maximum overvoltage discharge - Peak pulse current - AC cable with grounding Electrostatic discharge (ESD) is the leading cause of outdoor equipment failures. With a grounded Ubiquiti PoE adapter, TOUGHCableTM and TOUGHCable Connectors, you can effectively protect against ESD... damage.