Broonel Hard Headphones Case/Cover With Built in 2500mAh Power Bank For The Lily England Rose Gold Headphones With a built-in power-bank and impact resistant soft core design, this case keeps your headphones protected and fully charged. Internal powerbank charges in 30 minutes via Micro USB charger, can charge majority of headphones twice on a full charge. Power-Bank contains a 2500mah capacity UL certified Li-polymer battery with a Input / Output: DC 5V.1A. Single USB output, includes 50cm micro USB charging cable. Universal sized case, fits majority of popular Wireless Noise Cancelling Headphones including , Bose Quiet comfort, Beats Studio Wireless, Sony MDR, Sennheiser Momentum, B&O PLAY by Bang & Olufsen and many more