1. Active noise cancelling technology to enhance the power of noise filtering
2. Block the external noise to offer a superb listening experience
3. Suitable for users in noisy environment like subway, airline, highway, etc
4. Noise cancelling and common wired headphone available
5. Driver unit: 30mm dynamic speakers
6. Impedance : 32Ω±10%
7. Frequency response : 20Hz - 20K Hz
8. Reduction level: >15dB at 300Hz
9. Sensitivity: 102 dBμv at 300Hz
10. Cord length: 1. 2m
11. Plug: 3. 5mm stereo plug
12. Power requirement: 2 × AAA batteries (not included)