Imprint Method: Direct Print - Energize your next tradeshow with a unique accessory everyone will want! This portable power bank will keep your devices charged when you need them most. It comes with an attached key ring so it is always by your side. With an output of 1800 mAh and a li-polymer battery, this is a tool you can trust, so give it away to friends, employees and more. Just add your brand name or logo using our direct print method, and choose from a selection of colors. Input: DC5V 550mA, Output: DC5V 1A. Take charge of your campaign with this cool promo!