> Preparation > Charging the Headphones
Charging the Headphones
Charge the headphones before using.
When using a commercially available USB conversion AC adapter, make sure to choose one with an output voltage of DC 5 V and output current of 1 A and above. Otherwise, it may result in malfunction or abnormal heating.
Use only the supplied charging cable to charge the headphones.
The indicator lights up in red, and charging starts.
The charging time is approx. 4 hours. When charging is complete, the indicator goes out.
Operation is not possible while charging.
The headphones may stop charging if the temperature exceeds the charging temperature range (5 °C (41 °F) to 40 °C (104 °F)). (The indicator light goes out.) When this occurs, resume charging in an environment that falls within the charging temperature range.