JBL Personi-Fi 2.0 and Signature Sound: With 12mm neodymium speaker drivers that are precisely calibrated for high-fidelity listening on-the-go, you can enjoy your music in full color with JBL Signature Sound and deep bass. After that, utilize Personi-Fi 2.0 to tailor your audio experience to your particular hearing profile. True Adaptive Noise Cancelling: JBL Live Flex combines True Adaptive Noise Cancelling with the all-day comfort of stick-open earbuds. With technology that instantly adjusts to your environment, you can get rid of distractions and noise. Wireless Charging for Up to 40 (8+32) Hours of Playtime: Dead batteries don't belong in this short life. The JBL Live Flex earbuds have an 8-hour battery life, and the case has an additional 32 hours. Additionally, wireless charging that is compatible with Qi provides a boost to your all-day audio companion.