Fully charge the battery when using for the first time.
When the rechargeable battery is running low, the voice guidance will play the message “Low battery”, and the indicator lamp will flash in red. Charge the battery as soon as possible.
It takes about 2.5 hours to fully charge the headphones and about 3.5 hours to fully charge the charging case. (This time may vary depending on usage conditions.)
Charge the product in a well-ventilated place (10 to 35°C (50 to 95°F)) away from direct sunlight. Charging outside the normal charging temperature range may result in failure to charge or longer charging time. Otherwise, the battery may deteriorate, possibly resulting in shorter periods of continuous use or may fail to charge.