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; Power bank includes standard USB connector cable to charge battery from your computer or any USB port with a power supply; Device includes 4 LED indicator lights; Individual phone attachments not included only USB charging cable provided; Instructions 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.