specification	Capacity	material	Color	USD Price
capacity:19999mah (57wh)input:5V/2.5A                     output:5V/3.5A&3.5A          size:17 *10.5 *1.5cm   weight:520g                 working temperature:-10 to 50 degree	20000mAh	imitation leather	White/black	US$21.55