This portable power bank is ideal for charging your phones when you are in a no power area or when you are travelling. The outer body is made of metal and the inner body is made of plastic material. This product is cylindrical in shape and can easily fit in your pockets as well. It has a 2200A unit for quick charging. It is dust resistant, waterproof and shock repellent. It won't break, even if it drops, and usually will still operate. Also, there is a separate USB cable meant for charging your devices easily.