Featuresr aluminum casingr beautifully textured aluminum surface the single piece metal casing was created by high precision cnc digital cutting the surface is water and corrosion resistant and is perfect for everyday use simple design buttons indicator lights and connection ports are located on one end of the power bankr r 20000mah large capacityr premium li ion battery cells add an extra 20000mah to the battery life of your smartphone tablet or digital camera the power bank is cap