Cleverly designed 12 mm elements combined with the Stick form structure offer JBL's Pure Bass sound that makes you feel every beat of the beat. You hear more of what you want and less of what you don't want. Thanks to active noise cancellation technology and two microphones, you can minimize distractions. Thanks to the Ambient Aware technology, you can tune in to the frequency of your environment at any time - this way you can feel safer outdoors and on the move. The TalkThru feature, on the other hand, enables quick conversations without the need to take off the headphones. Effortless hands-free calls in stereo. Tune Flex is equipped with four microphones - so your voice is always heard clearly. You no longer have to think about whether you can answer a call or make one. With the VoiceAware feature, you can adjust the volume of the sound sent from the microphone input back to the headphones, and thus choose to what extent you can hear your own voice. You won't miss a beat either - that's ensured by the long battery life: 32 (8+24) hours or 6 hours + 18 hours in the case with noise reduction enabled. Need extra power? With just ten minutes of quick charging, you get two hours of playback time. Bad weather doesn't have to be an obstacle. Thanks to IPX4 waterproofness and sweat resistance, the Tune Flex headphones can survive all kinds of training and downpours.