From CNBC.com….
Apple’s new software can automatically switch your AirPods earbuds between devices as you move between them.
For example, if you’re listening to music on your iPhone, then walk to the living room and pick up your iPad to watch a video, the AirPods can automatically switch to the iPad without making you do anything.
At least that’s the way it’s supposed to work. But it can be a little finicky.