This Ubiquiti POE-24-12W adapter is actually a PoE injector for powering PoE devices over the same cable that also transmits data. So you don't have to be limited by the range of the power grid when choosing a location for the PoE network element. You can use the Ubiquiti POE-24-12 W adapter to remotely power selected routers, access points, switches, or antennas. The prerequisite is Fast Ethernet and, most importantly, a device with a PoE Extractor supporting 24 V input voltage.