Adaptive Noise Cancelling: Block out distractions with Smart Ambient on these earbuds, letting you control how much of your surroundings to let in, while 12mm drivers deliver rich JBL Pure Bass audio Listen for Longer: The JBL Tune Flex 2 earbuds provide 8 hours of battery, plus an additional 24 hours from the charging case with ANC on, or up to 12 plus 36 hours with ANC off Crystal Clear Calls: Two beamforming outer mics on each earbud pick up and transmit your voice while effectively cancelling out ambient noise, delivering crystal clear sound even when you're outside Multi-Point Connection: Seamlessly connect these earbuds to multiple devices via Bluetooth and effortlessly switch between your laptop and phone with Fast Pair for instant pairing on Android and Microsoft devices JBL Headphones App: Select the EQ that best fits your style and receive voice prompts in multiple languages to notify you when your battery is running low