TWS JBL Tune FLEX headphones in black ensure a comfortable fit of the earbuds without the risk of them accidentally falling out, even during active sports. Thanks to the open acoustic design, while listening to music, you will hear the sounds of the outside world in the background and will be able to quickly react if a dangerous situation arises. Dynamic drivers with membranes with a diameter of 12 mm will provide detailed sound in the frequency range of 20-20000 Hz.