*. Active noise cancelling technology to enhance the power of noise filtering. 
*. Block the external noise to offer a superb listening experience. 
*. Headphone foldable, convenient for traveling users especially for users in noisy environment like subway, airline, highway, etc. 
*. Driver unit: 40mm dynamic speakers 
*. Impedance : 32Ω+/-10% 
*. Frequency response : 20Hz - 20KHz 
*. Reduction level: above 20dB at 300Hz
*. Sensitivity: 102 dBμv at 300Hz 
*. Cord length: 1. 2m
*. Plug: 3. 5mm stereo plug(plug type can be changed according to customers' requirement)
*. Power requirement: 2 × AAA batteries(not included)