Microsoft Corp. announced Wednesday that its Surface Duo dual-screened phone will launch Sept. 10 for $1399. The company said in a blog post that the device will allow people to open up different apps on the two different screens to offer a productivity boost. People will also be able to use the phone as a single 8.1-inch screen running Android apps. Microsoft said that the device will paid with supported Bluetooth controllers for gameplay on its Xbox Game Pass Ultimate service that’s coming out Sept. 15. Surface Duo preorders begin today. Microsoft shares are up 0.8% in premarket trading Wednesday. They’ve risen 13% over the past three months as the Dow Jones Industrial Average has gained 17%.Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.