||BYER FLEX has been designed keeping both style and efficiency in mind. We have paid a lot of attention into fulfilling the promise of durability. Wave your goodbye to those fragile and delicate neckbands because this wonder product right here is flexible, foldable, and easy to store!.. Ergonomic sport design with a built-in microphone, this device features buttons to play, pause, and change songs on the go. This neckband features lightning speed Bluetooth connectivity with bluetooth V5.0.It also features micro-USB charging. And leaving the best for the last, a 1-2 hour charging time gives you 25 hours of uninterrupted playback! Yes, you heard me right. With a 280mAh battery, it gives you 180 hours of standby time when fully charged so that you use more and charge less!