Are you fed up with splicing into cat5 Ethernet cable to inject power over ethernet ?

This Power Over Ethernet - POE kit comes with an injector and extractor.
This will allow you to plug a standard 2.1mm center positive power adapter at the injector end, run your Ethernet cable and then on the far end plug the extractor into your device.
This system works by jumping into the unused pairs of the Ethernet cable running at 100 Mbits without the need to cut into the cable yourself.