[. . . ] Check that the following parts are attached in addition to the main unit: We declare under our sole responsibility that this product, to which this declaration relates, is in conformity with the following standards: EN55013 and EN55020. [. . . ] â· When using headphones, for safety keep the volume to a level at which surrounding sounds can be heard. â· To prevent injury, be careful not to let your fingers get caught between the housing and hanger. â· The ear pads may deteriorate after extended usage or storage. â· Always keep the headphones (particularly the ear pads) clean. â· Do not use benzene, thinners, or other organic solvents or insecticides on the main unit since they may cause a change in quality or color. â· The headphones have a structure by which the sound tends to leak out if the volume is too high. [. . . ] * For improvement purposes, specifications and design are subject to change without notice. [. . . ]