VidaBox’s new vCharger and vPower station are a complete long-distance Power-over-CAT5 USB charging solution. The vCharger draws constant voltage from a vPower station via CAT5 cable, and converts that voltage to charge a connected USB device, such as an Apple iPad, iPod, iPhone, Android device, Kindle Fire or Samsung Galaxy Tablet. The vCharger can be located as far as 328 feet away from the vPower, and still provide full charging power. Up to four vCharger units can be connected to a single vPower station by adding a vPower four-port adapter.

vCharger has no moving parts and is designed for ultra-reliable, long term use. This miniature, 3″x2″x2″ device can be easily hidden inside any in-wall/back boxes and function without ventilation; it is not rated for standalone, in-wall use. For added flexibility, the vCharger is backwards compatible and can be used with older Power-over-Ethernet (PoE) switches as power sources.

Her are all the specs: http://www.vidabox.com/products_vcharger_poe-like_cat5_usb_charger.php