The over-ear design of Quietum with advanced active noise cancelling technology, noise can be completely sealed off while you are enjoying your music.
 
Active noise cancelling
Reduce and minimize environmental noise for clearer music.

High Quality Sound
The independent 40mm drivers deliver crisp treble, sharp midrange and deep, rich bass.

Bluetooth® 4.0
Wirelessly connects to most devices including iPhone®, iPad®, iPod® and Android™ devices.
 
Main Spec
Wearing Style: Over-ear
Type: Closed                                 
Driver Unit: 40mm, Dynamic
Frequency Response: 20Hz – 20KHz
Sensitivity: 125 dB/mW (1kHz)         
Impedance: 32 Ω (1kHz)                        
Weight: 243.5g
Operation time: Up to 9 hours (ANC on); 12 hours (ANC off)