PoE To USB Power Supply
It can be difficult to get a wall-wart where you need it. The promise of PoE (power over ethernet) is great, but what if your device doesn't use ethernet? Perhaps you could mess with power injectors, but what if you've already got PoE available on your network? The PoE to USB Power Supply is like a USB wall wart for PoE. Get a PoE hub, run ethernet wherever you need it, plug the PoE to USB Power Supply in and you'll have 5V at 1A via a USB A connector.
