Ubiquiti's U-PoE-AF is a gigabit PoE injector 48 V, 0.5 A that is compatible with many Ubiquiti PoE devices. Surge protection, clamping protection, maximum surge discharge, and peak impulse current are features that help protect PoE devices. The injector also provides protection against electrostatic discharges ESD, which are the main cause of failures in external devices.