PS221 is high quality headset with passive noice reduction.
PS221 have passive electronics, its components are stereo cartridge with a frequency range from 20 to 17,000 Hz, electret microphone with noise-canceling. Each element has its own volume control. It can also switch mono / stereo. The microphone is located on the gooseneck. Ear gel and the headband is equipped for comfort fabric cushions.
PS221 headphones have a mass of 487 grams and the depth reaches 26 db noise reduction.