TechCrunch's Darrell Etherington that there will also be an ambient light sensor in that black bar (1:55 in the video below).It has been known since Google I/O that the black bar below the Moto 360 display contains the display drivers for the device, but apparently, Motorola actually outed a bit more info than that when it was showing off the device at Google I/O last month. Motorola's Cathay Bi actually told
This is actually pretty interesting news, because no other Android Wear device has an ambient light sensor. This will allow the Moto 360 to automatically adjust the brightness of the display, depending on if you're inside or out. Given the usage of a smartwatch, it is a bit odd that the Moto 360 is the only device to have the sensor, but it obviously won't be the last.
source: Android Police