There is some question about the authenticity of the picture, especially since the Xbox tile is supposed to be translucent. A look at the image shows that the tile is about as solid as can be. Still, if this is legit, the translation of the Settings page indicates that users will be able to make changes to the cellular radio to save battery life.
Microsoft is holding an event on January 21st at which time it is expected to unveil Windows 10 for Phones. The event will take place in Redmond, and of course you can find out all about the announcement right here.
source: Weibo via WMPoweruser