From the Panasonic/Technics Audio Connect app, once you have connected to the earbuds for the first time, the app continues to store the last know location of each earbud. If you misplace your earbuds, you can use the "Find headphone" option in the app when you are in range of the last recognized known location. When you select "Find headphone," it will emit sound from the earbuds as long as the earbuds are in range of your phone (roughly 33 feet or 10 meters without any obstacles / interference).
Since the true wireless earbuds are paired to the charging case, you will need to purchase both earbuds to recieve a replacement. Contact customer service so that they can assist you further.
To get support from a live agent (between 9am - 5pm EST), click on the widget you can find on the bottom right of the screen.
The chat widget looks like this:
This FAQ applies to models EAH-AZ40, EAH-AZ60, EAH-AZ70, RZ-S300, RZ-S500