AirFind.

AirFind is the latest in tracking technology to help you easily find your lost Bluetooth Headphones.
AirFind intelligently detects wireless headphones and also shows you list of nearby Bluetooth devices with their distance and signal strength. Device detail shows graphical signal strength to easily locate your headphones. If your headphones are out of range, you can set a notification on it. AirFind will notify you when it sees your headphones again. This works even when AirFind app is closed.
• See distance in feet or meters.
• Automatically get notified when your lost headphones are seen by the AirFind app.
• Track and Find any Bluetooth enabled headphones.
• Beautiful sleek design and responsive controls.