The Lenovo IdeaPad Yoga 2 Pro is an Ultrabook-class convertible device that can be used as both a tablet and laptop computer in the IdeaPad series. Lenovo unveiled the Yoga 2 Pro at the 2013 IFA in Berlin, Germany. It went on sale in the United States in October 2013. It comes in two colors, silver gray and clementine orange, and is designed for flexibility—allowing the user to use it in a variety of situations. Because of the durable hinge that allows the screen to swivel 360 degrees, the Yoga 2 Pro is able to fully utilize Windows 8 and its emphasis on touchscreen integration. The Yoga 2 Pro is the first laptop to earn a Green Mark certification from TUV that recognizes Lenovo for environmentally friendly manufacturing processes and low energy consumption.