K3 Powerporta Due' 6600 Portable Charger 6600 mAh power for charging on-the-go Input: 5.0V/2.0A (Max) Output: USB 1 ( 5V/1.0A ) USB 2 ( 5V/2.1A ) Dual ( 2) USB ports to charge products simultaneously Dimensions: 4 x 2.44 x .9