sport card reader headphone
Features:
◆ 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