ユーザーズガイド LEXMARK C540 ˬ

[. . . ] • Stay-in design for a more secure fit. • Built-in monitor function to hear surrounding sound without taking off the headphones. • Able to use as a regular headphones even when the POWER switch is set to “OFF”. • Supplied plug adaptor for easy connectivity to stereo or dual jack for in-flight music services. • Replace the battery with a new one when the POWER indicator blinks or lights off. [. . . ] • Handle the driver units carefully. • If you feel drowsy or sick while using these headphones, stop use immediately. • Install the earbuds firmly onto the headphones. If an earbud accidentally detaches and is left in your ear, it may cause injury. Specifications Type Dynamic, closed Driver units 13. 5 mm, dome type (CCAW adopted) Power handling capacity 50 mW Impedance 70  at 1 kHz (when the power is on) 16  at 1 kHz (when the power is off) Sensitivity 110 dB/mW (when the power is on) 103 dB/mW (when the power is off) Frequency response 8 Hz – 23, 000 Hz Total Noise Suppression Ratio*1 Approx. 1. 5 m OFC Litz cord, neck-chain (including control box) Plug Gold-plated L type stereo mini plug Power source DC 1. 5 V, 1  LR03 (size AAA) battery Mass Approx. 9 g headphones (not including cord) Approx. 26 g control box (including battery, not including cord) General Notes on headphones Preventing hearing damage Avoid using headphones at high volume. Hearing experts advise against continuous, loud and extended play. If you experience a ringing in your ears, reduce the volume or discontinue use. Do not use headphones while driving and cycling, etc. As headphones reduce outside sounds, they may cause a traffic accident. In this case, the noise canceling function, Digital Equalizer and S-Master are not active, and the headphones operate as passive headphones. • Check the connection of the headphones and the AV equipment. • Check that the connected AV equipment is turned on. • Turn up the volume of the connected AV equipment. Notes Claws • Prolonged use of the noise isolation earbuds may strain your ears due to their snug fit. If you experience discomfort or pain in your ears, recommend to take a short break. • The pressure-relieving urethane cushion is extremely soft. Therefore, do not pinch or pull the urethane cushion. If the urethane cushion is broken or detached from the earbuds, it will not take its correct position and the earbuds will lose their noise isolation function. • The pressure-relieving urethane cushion may deteriorate due to long-term storage or use. If the pressure-relieving power is lost and the urethane cushion becomes hard, the earbuds may lose their noise isolation function. • Do not wash the noise isolation earbuds. [. . . ] Observe the correct polarity when installing battery. Notes Tip Insert the  end first. • After you turn on the power of the headphones, you may hear a slight hiss. This is the operating sound of the noise canceling function, not a malfunction. • Do not cover the microphone of the headphones with your hands. The noise canceling function may not work properly. [. . . ]