Multifunctional headphones equipped with a microSD card slot, allowing you to play music (MP3) by inserting a microSD card, even without a player such as a smartphone.Supports both Wired/Wireless use, so even if the battery runs out, you can continue listening using the included cable. Bluetooth version 4.2 is supported, and FM radio can also be listened to.The foldable design makes them convenient to carry.