Slide into new clients' hands with this Slim 4000 mAh Aluminum Power Bank! This charger features an ultra-thin, 10 mm design, which allows the recipient to stow away in a pocket or purse until they need it. Its purpose is to provide power for various electronic devices, like digital cameras, mobile phones, mp3 players and more. It comes in a gift package with a clear plastic window and instructions, making it an attractive giveaway item. What more can you ask for in a promo tool?