Atom Headphones

-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