Sometimes (not always mind you, so don't be greedy) the button to mark as lost the item the app claims it can detect is near by will turn into a ring button and you can actually make the device ring. But only under mysterious circumstances. Mostly the app is for you to rest assured that the thing you can't find is nearby, or to just mark it lost. UPDATE: I came back to take a star away. It's worse than ineffective. It's the tinyest but effective so u occasionally trust it when you NEVER should.