4 PORT USB POWER ADAPTER: iHome's phone wall charger block is a usb adapter plug that converts a single AC outlet into a multiple usb charger, allowing you to charge up to 4 devices at the same time! FLAT USB WALL PLUG: Our USB charger block is flat and not bulky like other USB blocks. iHome's flat usb wall charger and USB plug offers a slim design that allows you to easily access hard to reach outlets that are behind furniture or other tight spaces.