Aluminum and black ABS plastic/PC trim housing with Silicone charging pad. UL2056 Certified. Dual USB ports allow two devices to charge simultaneously. Micro USB Input: 5V/2A. Total USB Output: 5V/2.1A. Wireless Output: 5V/1A. Approx 5 to 6 hours recharge time. Connect a USB cable to the device port for optional wired charging. Charges through most protective cases. Not compatible with cases featuring magnetic components, metal or finger ring. 5 D x 2.75 W x 0.625 H.Includes micro USB charging cable LED lights indicate battery levels NOTE: If your device is not compatible with wireless charging you may require external wireless charging receiver or receiver case.