Using the noise cancelling design, the new Sony MDR-NC13 in-ear headphones delivers superb-clear sound quality by reducing ambient noise up to 87,4% in wear comfort black color design.
Only powered by a single AAA alkaline battery, the gadget can serve you for 100 hours continuous listening time. It is a good stamina in-ear headphones, right?. In every-day-music, at least you must buy one AAA alkaline battery every week.
Sony MDR-NC13 in-ear headphones is having 19g mass including battery, and scheduled to hit market in this month, April 2011. The price is still unknown yet. [Dandy Gadget Source]