Whether you play sports, travel, or get tired of tangled cables, these headphones are the ideal solution. They can play for up to 3 hours on a single charge, and you can conveniently charge them using the supplied charging power bank and Micro USB / USB-A cable from a laptop or mobile phone charger. With this charging power bank, you can enjoy listening for up to 9 hours. Their miniature dimensions and very low weight make them perfect for high mobility in sports and on the road. The headphones are specially designed to provide maximum soundproofing from the surroundings (e.g., in vehicles) while not disturbing those around you with music production.