Imprint Method: Silkscreened - The Rotate Car Charger is an auto plug adapter that connects into the accessory power outlet to charge personal devices. It's compatible with smartphones and personal devices that provide USB cable for charging (excluding iPad® and tablet devices). Input: 12-24 Volts. Output: 5V/1 Amp. A USB cable is not included. It also includes a metal split key ring. US Patent #D714,727S. iPad® is a trademark of Apple Computer, Inc.