User manual BOSE QUIETCOMFORT 15

[. . . ] It is best to avoid extreme volume when using these headphones, especially for extended periods. CAUTION: · Do not use these headphones when operating a motor vehicle, or where the inability to hear outside sounds may present a danger to you or others. [. . . ] The battery light indicator will illuminate. AAA alkaline battery (IEC LR03) You do not need to connect the headphones cord for noise reduction only operation. 2 English TAB 2, 10 TAB 3, 11 TAB 4, 12 TAB 5, 13 TAB 6, 14 TAB 7, 15 TAB 8, 16 For noise reduction and audio R L 2. For information on using your headphones on an airplane, see "Connecting to in-flight entertainment systems" on page 4. You can use the headphones with a variety of audio sources: airline audio, a CD, DVD or MP3 player, a personal or laptop computer, or home stereo. Gently push the headphones plug all the way into the connector opening on the left earcup, until the plug housing is flush with the earcup. Note: The LO setting of the LEVEL switch lowers the volume levels of strong audio output signals which are common on airline systems. If you find that the volume level is too low, set the LEVEL switch to HI. On the right earcup, slide the power switch forward to the On position. The battery light indicator will illuminate. 3 TAB 8, 16 TAB 7, 15 TAB 6, 14 TAB 5, 13 TAB 4, 12 TAB 3, 11 English TAB 2, 10 English Connecting to in-flight entertainment systems Audio jack configurations on airplanes vary. One 3. 5 mm jack and one power jack Use the single plug in the 3. 5 mm jack (the larger one). One power jack and two 3. 5 mm jacks Use the dual 3. 5 mm output plug adapter for the two 3. 5 mm jacks. The power jack does not need a connection. To connect to in-flight entertainment systems equipped with dual output connectors, use the dual 3. 5 mm output plug. Note: Airline audio may not equal the high quality audio you can get from a home stereo or a portable source. WARNING: Use only the Bose® airline adapter to connect headphone to airplane seat jacks. DO NOT use adapters intended for mobile phones to connect to the airline seat jack, as this could result in personal injury such as burns or property damage due to overheating. Remove and disconnect immediately if you experience warming sensation or loss of audio. 4 English TAB 2, 10 TAB 3, 11 TAB 4, 12 TAB 5, 13 TAB 6, 14 TAB 7, 15 TAB 8, 16 Storing the headphones To store the headphones in the case, rotate the earcups inward, then place the headphones in the case. Battery life and replacement Although it varies by usage, battery life averages 35 hours. The battery light indicator starts flashing when there are approximately 5 hours of battery life remaining. When a replacement is needed, use a AAA alkaline battery (IEC LR03). Note: Remaining battery life may vary when using rechargeable batteries. [. . . ] It is also engineered to withstand the environmental conditions that are common in unpressurized aircraft. WARNING: Except in case of emergency, Bose recom- mends that you NOT use these headphones as aviation communication headsets because: · No incoming audio will be heard with a discharged or improperly installed battery. This could result in the potential of missed communications while piloting an aircraft. [. . . ]