Aluminum; Slim power bank emergency battery charger with soft PU leather-like accent wrap body; Power/Technology: Rechargeable Lithium Polymer battery; Capacity: 4000 mAh; Input: DC 5V/1000mA; Output: DC 5V/2100mA; A power bank typically retains 80-90% of its original capacity resulting in an expected lifespan of 400-500 charges and discharges; 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; Includes 4 LED indicator lights: all 4 lights are illuminated when device is fully charged Indicator lights flash while device is charging, and blink when power bank is charging your device Lights will turn off one by one as power is drained from device use; Individual phone attachments not included, only USB charging cable provided; Instructions included; FCC approved; UL Certified (UL File # MH60484); Product Size: 4.375" w x 2.75" h x 0.5" d; This item cannot ship internationally except to Canada via ground. This item can only ship to Alaska, Hawaii, Puerto Rico and any other small U.S. island territory via Air.