Leave the bulky power adapters at home and charge your USB devices with your USB data cable and this 4-port USB Wall Charger from Monoprice! This Wall Chargers features four separate USB ports and is capable of putting out a total of 2.1A charging power. You can use your standard USB mini or micro cables to charge your USB capable devices, such as smartphones, mp3 players, tablets, etc. Although any port can put out up to 2.1A of charging power the port on the lower left side, labeled "2A Output" is specifically designed for compatibility with the Apple iPad devices. The charger uses a standard, non-polarized US blade plug design (NEMA 1). When not in use, the blades fold sideways into the charger, producing a sleek, slim package that can easily fit into a pocket or purse. The charger measures 2 1/8" wide, 2 7/8" high, and 13/16" thick. A small green LED on the front of the charger illuminates when the charger is plugged into a live power socket.