1 CR123A batteries required. (included)

Power up to power on Get up to six hours of battery life with an additional seven hours from the case that doubles as a wireless charger
Premium sound Tuned by AKG, an optimized driver offers substantial bass, while a volume driver gives you a wider range of sound
Just what you want to hear Control how much surrounding noise you want with Ambient Aware. Quick Ambient Mode lets you hear traffic, flight announcements and coworkers calling out to you