Pioneer says that the their SE-NC31C noise cancelling in-ear closed type headphones shutting out up to 90% of ambient noise which will allow you to enjoy your music on the move without having to raise the volume in noisy places.
The SE-NC31C are equipped with 14.2 mm drivers that feature a wide frequency response (5-16,000 Hz) and deliver high clarity and powerful bass. They also have a built-in microphone which picks up outside noise and cancels it out by using an opposite sound wave. The earphones have a gold-plated 3.5 mm stereo mini-plug and a silver-plated OFC wire for better audio transmission and offer up to 120 hours of continuous playback, thanks to its power-saving design. They come with a pouch where you can find three sizes of ear tips for a comfortable and secure fit an in-flight plug adapter and an alkaline size AAA battery.
When you turn off the noise canceling feature, they can be used as regular headphones.