Comfortable head fit design and great sound quality for music enthusiasts. 

-Bluetooth 4.0-10m range
-USB port and SD card slot to play storage devices-Compatible MP3/MP4/WMA, mobile and Laptop
-frequency:2.4-2.4835GHz ISM band-Crystal clear sound-sensitivity:115dB S.P.L at 1kHz
-High resistance     ：32Ω
-battery :250mah