The POE-24-24W-G 24V PoE 1A Gigabit Adapter from Ubiquiti Networks has
features like surge protection, clamping protection, maximum surge
discharge, and peak pulse current to help protect your Ubiquiti PoE
devices. It also includes an AC cable with earth ground.
ESD
attacks are the leading cause for device failures. You can effectively
protect against ESD attacks using this grounded PoE adapter. This PoE
adapter is compatible with most Ubiquiti PoE devices, including
airFiber, airMAX, airVision, UniFi, and mFi.