1. Red line: Power + 
2. Blackline: Power - 
3. I core shield wire: audio system input port 
4. Power supply: DC6V-12V 
5. Dissipation circuit: 10mA 
6. Frequency response: 300-5500Hz, Output signal 
7. Out Impedance: 600ohm 
8. Out Level: 0-6V 
9. Environment Temperature: -25 to 85 degree C 
10. Humidity: 30-90%