Aluminum;Power/Technology: Rechargeable Lithium Polymer battery Input DC 5V/1000mA Output DC 5V/2100mA Capacity: 4000 mAh; Charge time differs by device Must charge power bank prior to first use; Device includes 4 LED indicator lights; Includes instruction manual and micro USB to USB-A power bank charging cable; phone charging cables not included; FCC approved; UL Certified (UL File # MH60484); Product Size: 2.75" w x 4.5" h x 0.275" d; This item cannot ship either ground or air internationally, including Canada. This item cannot ship to Hawaii, Alaska, Puerto Rico or any other destination where the package must go into a plane.;
