Troubleshooting - Jittery Playback, Rumbling, or a Foreign noise is heard from Earbuds - RZ-S300, RZ-S500, EAH-AZ70

The playback is jittery

• Within the Audio Connect App (Panasonic / Technics), go into your app's settings and set the connection mode to "Connection Priority." 
• Check if the Jittering continues.
• If the noise continues, the earbuds may have a possible failure. Please contact customer service for further analysis.

A rumbling or foreign noise

In this case. The earbuds may have a possible failure. Please contact customer service for further analysis.