Update: Microsoft has now announced the Microsoft Band, a $199 fitness band that does everything described below. It goes on sale Thursday.
Microsoft hasn’t officially announced its wearable device, but it seems the company has accidentally published its desktop syncing client to the Mac App Store early. Whoops. The device is called the Microsoft Band (possibly Lumia Band, according to some currently non-functional support URLs) and sports a 310 x 102 resolution display.
Other key feature include the ability to get phone notifications on the Band, create reminders using Cortana, and more: