Rosewill 150W Can Sized Silence Car Inverter with 2.1 Amp USB Port (RCP-E152C) The output from USB port reach 5 V/2.1 Amp allows you to charge iPhone/iPod, MP3/MP4 players and Notebook computer at the same time as the attached photo Can size design allows this unit to stay secure in cup holder while operating and save space Dynamic DC Bus Voltage regulation