Do not install this app

I bought brand-new JBL Everest Elite 700, it had worked fine. But then I installed this official JBL" app and tried to upgrade the headphones firmware with it.. Then suddenly headphones has been bricked. I mean dead.. I cant even listen music with cord. Everything just gone in a single moment. Do not buy JBL do not ise their products or apps. Such a Shame...

Tyler Durdrn about JBL Headphones, v2.1.0