1.Adjustable wireless headphone with FM radio function  
2. Bass horn sytem  
3.Transmitter/Receiver frequency:77MHz/78MHz+30ppm              

4.FM frequency:87.5-108.5MHZ   

5.Transmitter distance:≥30m(No obstacle) 
6.Sensitivity:  ≤22uv                                             

7. S/N:≥50dB                                               

8.Transmitter power: ≤5mw   Receiver power:≤10mw 
9.Power supply for transmitter:5~10V DC                                                             
 Receiver voltage:2.2~4.5V DC