Portable Charging Bank. 20,800 mAh 2 Amp output and 1 Amp output. Samsung SDI Cells for superior performance. Pass-through charging allows charging device that is plugged in and battery simultaneously from USB outlet. Battery indicator lights. Enough power to charge an iPhone about 12 times or an average Android about 9 times. Has 2 outputs so 2 devices can be charged simultaneously. Gives most tablets 1 – 2 charges, depending on brand. Comes with a charge so no waiting to use it! One year warranty.