[. . . ] [. . . ] Digital noise canceling headphones with Sony's unique DNC Software Engine. Notice for customers: the following information is only applicable to equipment sold in countries applying EU directives Power does not turn on. Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) Stay-in design for a more secure fit Hearing environmental sound for safety The sound of the connected source device, such as radio and TV, cannot be heard, or headphone sound is noisy. Disposal of waste batteries (applicable in the European Union and other European countries with separate collection systems) [. . . ] [. . . ]