Ubiquiti POE-24-12W-G Gigabit PoE Adapter – 24V 0.5A Power Injector 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, TOUGHCable™, and TOUGHCable Connectors.