[. . . ] In order to prevent accidents: Do not wear the earphones in an environment that requires your special attention (e. g. Keep the earphones out of reach of children who could swallow smaller pieces. [. . . ] Keep the earphones out of reach of children who could swallow smaller pieces. In order to prevent damage to the earphones: Do not expose the earphones to heat (hair dryer, radiator, etc. ) and do not store in direct sunlight for extended periods. Protect the earphones from moisture. 1 Delivery includes 1 pair of MX 90 VC earphones with volume control 2 pairs of foam ear pads 1 cable clip 1 in-flight adapter 1 carrying case 1 instruction manual Adjusting the earphones to your ears Use the foam ear pads for optimal sound. The earphones must be seated as close to your ear canals as possible. 2 Inserting the earphones into the ears L R WARNING!Interference with cardiac pacemakers The headphones generate a magnetic field which could interfere with cardiac pacemakers and implanted defibrillators. 7 Specifications Transducer principle Frequency response Nominal impedance Sound pressure level at 1 kHz and 1 volt THD at 1 kHz, 100 dB SPL Connector Cable length Weight dynamic earphones 16 to 23, 000 Hz 16 120 dB < 0. 1% 3. 5 mm stereo jack plug, nickel-plated 1. 2 m approx. 22 g 8 Manufacturer Declarations Warranty Sennheiser electronic GmbH & Co. For the current warranty conditions, please visit our website at www. sennheiser. com under "Service & Support" or contact your Sennheiser partner. Declaration of Conformity This product is in compliance with the essential requirements and other relevant provisions of directives: · EMC Directive (2004/108/EC) · RoHS Directive (2002/95/EC) · WEEE Directive (2002/96/EC) The declarations are available at www. sennheiser. com. Before putting the device into operation, please observe the respective country-specific regulations! [. . . ] Declaration of Conformity This product is in compliance with the essential requirements and other relevant provisions of directives: · EMC Directive (2004/108/EC) · RoHS Directive (2002/95/EC) · WEEE Directive (2002/96/EC) The declarations are available at www. sennheiser. com. Before putting the device into operation, please observe the respective country-specific regulations! [. . . ]