noise cancelling headphone

  
  
This kind of noise canseling aviation headphone employs an electronic circuit that
reduce ambient noise and improves audio reproduction quality to enhance your listening
experience for high-quality,disturbance-free music no matter how noisy
the environment.Its foldable and compact design makes it ideal for the consumer
for use in airplane,train and bus when traveling. 
The follow is the technical parameter : 
1:Noise Canceling Rate:10-15dB 
2:Frequency range: 20-20,000HZ 
3:sensitivity:102dB 
4:Max Input Power:500mW 
5:Active Noise Attenuation:100-1,000Hz > 10dB at 300Hz
6:Jack Size: 3.5-6.3mm plug and airplane jack 
7:Cord Length:2.1m 
8:Power Supply:2*AAA1.5V batteries.