Noise cancelling headphone Specifications:
Frequency Response: 20~20K Hz
Impedance: 32 Ohms
Sensitivity: 105dB 2dB/mW
Speaker Size: 40mm
THD: Less than 1%
Active Noise Rejection: 8~15 dB
Cable Length: 1.5m
Plug: 3.5mm stereo + dual mono adaptor
Power Source: One AAA battery