Large 40mm speaker drivers. Two advanced dynamic speaker drivers deliver exceptional, high-quality stereo sound with deep bass. Feel the richness of your music and hear more than ever before. Additionally, you'll experience fuller and more intense sound when watching movies and videos. 25 hours of playback: Enjoy music from morning to night with a 2.5-hour charge from the large 500mAh lithium-ion battery. Switch from Bluetooth to wired mode using the 3.5mm audio cable so you can listen even when the battery is nearly empty. True comfort: The ultra-soft memory foam ear cushions and adjustable headband ensure an optimal fit and reduced pressure for comfortable listening. Premium headphones: Sleek design paired with powerful features like robust 40mm drivers, Bluetooth 5, and a large battery. An integrated microphone for calls and convenient 3-button controls complete this personalized audio experience.