ENERGIZER 900 Watt Power Inverter converts 12V DC from car's battery to 120 Volt AC with 2 USB ports 2.1A shared compatible with iPad iPhone 900W continuous / 1800W peak power LCD Display: Input Voltage / Output Wattage / Battery Level Ultra Silent (thermal fan).Note: Unit has to be connected to a car battery 2 x standard North American AC outlets 2 x USB charging ports 2.1A (shared)