Customized Power Bank, Roseland Slim Power Bank 4000 - UL Certified & Aluminum, The Roseland Slim 4000mAh UL Power Bank, UL certified high capacity aluminum slim power bank provides a 4000mAh battery for quick and powerful charging.Safe to take on flights so you never have to be without a charge.* Includes a micro USB charging cable and a user's guide*Standard white boxSpecificationsUL certified batteryPower output: 5V/1APower input: 5V/1ACapacity: 4000mAhMaterialQuality aluminum ... #PWB039 $12.00/each.