Take a look at this link:
http://www.bose.com/controller;jsessionid=Ahn0FjkrywF43n9iEkf7A9h9ZJTn CqMMyuO7bElZFhSOgE9Hx727!1224019209?event=VIEW_PRO DUCT_PAGE_EVENT&product=qc2_headphones_index&pageN ame=/home_entertainment/headphones_headsets/index.jsp

/Mikhail