Detect the connection/disconnection of the wearable device and the Android phone

When Pebble is connected/disconnected, the Pebble watch has an Intent sent globally. This allows the phone app to know if the watch is connected.
I have searched, but I can't find information about similar features of Android Wear.
How do I know if the wearable device is connected to the phone? Is it possible to receive events like Pebble?
Thank you.