Ubiquiti PoE Adapters provide a variety of features to help protect your PoE devices. Surge protection Clamping protection Maximum surge discharge Peak pulse current AC cable with earth ground Electrostatic discharge (ESD) is the leading cause for outdoor device failures. You can effectively protect against ESD damage using a grounded Ubiquiti PoE Adapter, TOUGHCableTM, and TOUGHCable Connectors.