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