Boost your brand's staying power with new and potential clients by adding this Leatherette Slim Power Bank to your next advertising campaign! It features a 4000 mAh lithium ion grade A non-recycled battery, blue LED indicator lights, a USB output and a micro USB input (cord included). This product can be used to charge most phones, mp3 players and more, simply requiring the charging cords from the devices to get the extra juice they need! UL Listed (UL File # E485248, Model # AST-MP450). Output: 5 Volts/1 Amp