SD card wrieless music headphone
Featuers:
◆ As MP3 Micro SD card headphone  
◆ As FM radio                 
◆ As Multimedia computer headphone  

Specifications:
Supported file formats:MP3,WMA          
Communication protocols:USB2.0      
Digital frequency:24-Bit   
Audio frequency response:20Hz-48KHz                         
SNR:About 75db(1KHz)         
FM frequency range:87.5MHz-108MHz                      
FM receiver sensitivity:86db uV                       
Output power(peak)20mW     
Channel separation:30db at 1KHz S.P.L           
Extermal power supply:USB5V/350mA     
Power(peak):40mA      
Battery life(full):6 hours