The headset supports the card inserting function, the internal card slot design, the memory card within 32g, and the music file in MP3 format, Neodymium iron boron speaker, greatly improved music performance, details restored to the studio scene, excellent bass;Intelligent noise reduction, shielding, listening, lossless Bluetooth transmission / nearly 100 square meters of transmission distance 400mA large capacity lithium battery, playing continuously for about 8-12 hours. Standby to 1445 hours It supports wired mode and aux audio input. It can still be used after power failure;Foldable carrying, convenient for income package, expansion beam design, humanized expansion design, size adjustment Plug in mode, card mode (limited to 32g), Bluetooth mode, three modes switch freely Colour:Black Material:ABS Package Contents: 1 * headphones 1 * USB charging cable 1 * audio cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.