when did the surface pro 4 come out
Surface Pro 4 The Surface Pro 4 is the fourth-generation Surface-series 2-in-1 detachable, designed, developed, marketed, and produced by Microsoft. The Surface Pro 4 was announced on October 6, 2015[8] alongside the Surface Book. In the U.S. and Canada, the Surface Pro 4 was released on October 26, 2015.