Features & details jbl pure bass sound gives you enough bass to give your whole body a boost and get that extra push right when you need it the most. with 30 hours of playback (6 hours in buds/24 hours in case), you’ve got the extra inspiration it takes to make you go that extra mile. the endurance peak ii powerhook design lets you adjust the headphone to your size and comfort level. with dual connect you can take calls, adjust volume, or use your voice assistant on either ear, so you can stay flexible and never mess with your momentum. hands-free stereo calls & voice assistant access lets you keep in contact with your people and stay in control of your playback without ever interrupting the flow of your workout. Wireless communication technology: Bluetooth Included components: JBL Endurance Peak II, 2 sizes of eartips, Enhancer, Type-C charging cable, Charging case