Charge 4 controllers simultaneously in only 2.5 hours using the Energizer PS3 Charging System. Charge 2 controllers using the charging station and two more with USB cable (sold separately). This charger base features a functional and stylish design. You can tell when the station is charging using its connection. A red light will appear (when it's still charging) or a green one (when fully charged). The AC power cable included with the unit powers it.