When charging the headphones, be sure to use a USB to AC adapter with DC 5 V power output to avoid malfunction or abnormal heat generation.
Use only the supplied charging cable to charge the System.
Do not use this System while charging is in progress as the rechargeable battery may become hot.
1Turn off the noise canceling function.
2Using the supplied charging cable, connect the System and a commercially available USB conversion adapter or a computer while the computer is on.
The indicator lights up in red, and charging starts. When charging is complete, the indicator goes out.
The charging time is approx. 3.5 hours.