Reinvent the way you work out with the new, exclusive Harmonics 230. Designed to take your workout experience to the next level with its super flexible design, and unmatched Battery capacity. The Bluetooth earphones come with the latest 5.0 Bluetooth technology, with 10mm drivers that are 20% larger than ordinary earphones. Its unique rapid charging allows you to charge it for up to 2 hours of playtime in just 5 minutes. Or, you can also charge for just 20 minutes and play seamlessly for up to 4 hours at a time. Charge the wireless earphones fully and enjoy a 7-hour playtime. The wireless earphones with Bluetooth also come with a lightweight, liquid silicone neckband which is super comfortable to use for long hours. Simply hang it around your neck and you are good to go. Also equipped with magnetic latches on each earbud, so they can stick together when not in use, preventing slipping and tangling. Choose from 3 different earbud sizes to find your perfect fit.