Dual Channel Wireless IR Headphone

1. A/B Dual IR channels wireless headphone    
2. Carrier frequency:        
     a) A channel: Right channel: 2.8MHz;Left channel: 2.3MHz    
     b) B channel: Right channel: 3.8MHz;Left channel: 3.2MHz  
3. Speaker: 40mm mylar       
4. Cone impedance: about 32ohm     
5. Effective range (maximum): about 10 meters    
6. Audio model: stereo       
7. S/N ratio: 70dB(minimum)       
8. Channel separation: 40dB(minimum)     
9. Frequency response: 30 ~ 20,000Hz      
10. Power supply: 2 x AAA battery    
11. Battery life:about 48 hours