<ul><li>300mah Playtime &amp; USB-C Fast Charging: The bluetooth headphones has a long battery life, up to 30-50 hours music time, You can listen to audiobooks and podcasts all the day.Digital Power Display :Wireless earbuds with digital display make it obvious to show the battery power of the ear buds.Suppor TF Card: With TF slot, it can work with TF card. Wireless neckband headphones no need to connect bluetooth can also enjoy music or e-books in your TF card. You can enjoy your running and freedom without phone. （Note: The wireless neckband headset not include TF card）10mm dynamic drivers (20% larger than ordinary earphones) of this in-ear headphone, offer you with impressive sound.Foldable Neckband &amp; Magnetic Earbuds: The bluetooth headphones have a foldable durable silicone neckband, you can fold the headphone into your pocket. Magnetic suction type ear buds automatic adsorption, avoid entanglement during</li></ul>