[. . . ] They come with a variety of 3 cap sizes to ensure a perfect seal and comfortable fit. [. . . ] They come with a variety of 3 cap sizes to ensure a perfect seal and comfortable fit. Ideal for planes and trains Optimal listening in noisy environments · Compact electronics reduce unwanted external noise by 75% · Creates a perfect seal for perfect sound Made to fit you and your lifestyle · Super-soft ear cushions for hours of comfort · 3 interchangeable rubber ear caps for optimal fit in all ears · Small control box makes bulky control boxes unnecessary · Hang the headphones around your neck for convenience Always ready to go · Adapter for in-flight entertainment system connection · 3. 5 - 6. 35 mm adapter connects to all types of audio devices · Battery included so you can use your product straight away Noise Cancelling Headphones 15382-30-16/10 Specifications Sound · · · · · · · · · · · · · · · Acoustic system: Open Diaphragm: Mylar dome Frequency response: 18­20, 000 Hz Impedance: On: 245 ohms; Off: 116 ohms Magnet type: Neodymium Maximum power input: 20 mW Noise cancelling effect: 12 dB at 200 Hz; 90 - 2000 Hz Sensitivity: 102 dB Speaker diameter: 8. 6 mm Type: Dynamic Voice coil: Copper Cable length: 1. 5 m Connector: 3. 5 mm stereo Finishing of connector: Gold plated Type of cable: OFC · · · · · · · · · · · · Highlights Inner Carton EAN: 87 12581 55597 9 Inner carton (L x W x H): 20. 1 x 10. 6 x 21. 1 cm Number of consumer packages: 6 Gross weight: 0. 578 kg Net weight: 0. 1881 kg Tare weight: 0. 3899 kg 75% Noise Cancelling Outer Carton Connectivity EAN: 87 12581 55596 2 Gross weight: 1. 431 kg Outer carton (L x W x H): 24. 4 x 22. 8 x 25. 5 cm Net weight: 0. 3762 kg Number of consumer packages: 12 Tare weight: 1. 0548 kg Smart noise cancelling technology enhances the pleasure of listening to lower volume levels in noisy environments. It's particularly good at removing low frequencies like jet engine noise, so you can enjoy soft music on flights and in trains and similar places without hearing a distracting buzz in the background. The adapter simply converts the standard double-mono jacks to a stereo headphone jack. Audio jack adapter included With this adapter, you can use your headphone on equipment with either 3. 5 or 6. 35 mm jacks, giving you a wider choice of audio devices. Battery included No need to buy batteries to get started. Just drop the batteries in and go! Issue date 2011-04-19 Version: 5. 0. 7 © 2011 Koninklijke Philips Electronics N. V. [. . . ] The adapter simply converts the standard double-mono jacks to a stereo headphone jack. Audio jack adapter included With this adapter, you can use your headphone on equipment with either 3. 5 or 6. 35 mm jacks, giving you a wider choice of audio devices. Battery included No need to buy batteries to get started. [. . . ]