Purpose: Classic, Universal, Applicable to the full range of IBM Lenovo thinkpad laptop (new Ultrabook Ultrathin laptop carefully buy, might touch the screen when you close it, such as new models of Thinkpad keyboard after the end of 2013 : X1 CARBON, T440, T440p, T440s, T540, T540p, W540, X240, X240t, X240s).
