Universal AC-DC Power Socket Adapter Converter (Voltage Transformer) - Use Car Chargers in 110V AC Wall Outlets Blackberry Storm 9530 Let's you use 12V chargers for most electronics in regular 110V outlets at home, work or traveling Eliminates need for two chargers for cell phones, iPods(TM), MP3 players and other devices Safely switches 110-240V AC input into 12V DC (same as your car) power supply Compact, lightweight and easy to carry in briefcase, purse or luggage Pays for itself several times-over by saving cost (and clutter) of multiple chargers