Microsoft Corp. MSFT, +2.40% introduced two new enterprise-grade devices on Tuesday, the Surface Pro 4 tablet and Surface Book laptop. The tablet's screen measures 12.3 inches diagonally, versus 12 inches for the Surface Pro 3. Microsoft said it is 30% faster than its predecessor. The tablet is compatible with an updated stylus that has a virtual eraser, and a keyboard that Microsoft said mocks a traditional laptop keyboard with better-spaced keys and a larger track pad. The Surface Pro 4 will retail for $899. Preorders open on Oct. 7, with shipments beginning on Oct. 26. Meanwhile, Microsoft said Surface Book is two times faster than Apple Inc.'s AAPL, +1.57% MacBook Pro. It is the "thinnest, most powerful PC ever created," said Panos Panay, corporate vice president of Microsoft. The laptop has a 13.5-inch screen and will retail for $1,499, versus $1,299 for the 13-inch MacBook Pro. Shipments begin on Oct. 26. Shares of Microsoft ticked up 0.8% to $46.98 in recent trade. They are up 6% over the last three months, outperforming the S&P 500's 4.2% decline.